Foram encontradas 50 questões.
Em relação ao Ciclo do Ácido Cítrico, marque V para as afirmativas verdadeiras e F para as falsas.
( ) É uma rota universal no processo celular catabólico aeróbico, onde os compostos derivados da quebra de carboidratos (e outros combustíveis orgânicos) são oxidados até se tornarem dióxidos de carbono. Durante este processo, a maior parte da energia é temporariamente armazenada em carreadores de elétrons (NADH e FADH2), os quais são liberados posteriormente por estes carreadores e transferidos para o oxigênio que, junto com H+, formará a água e a energia gerada pelo fluxo dos elétrons, ajudando na síntese de ATP.
( ) Através de sete reações sequenciais (incluindo duas reações de descarboxilação), ocorre a conversão do citrato para oxaloacetato com a liberação de duas moléculas de dióxido de carbono. O caminho é cíclico e, no final, para cada molécula de citrato degradada, uma nova molécula será produzida pela entrada de um novo grupo acetila.
( ) Além da acetilcoenzima A, outros compostos formam alguns intermediários desse ciclo (com quatro ou cinco carbonos), como, por exemplo, o produto da digestão de vários aminoácidos, que podem ser oxidados por ele.
( ) A produção da acetilcoenzima A, que entrará nesse ciclo, é feita pela ação do complexo enzimático do piruvato desidrogenase. Este complexo enzimático é inibido alostericamente por altas concentrações de ADP, NAD+ e Coenzima A, indicando que existe energia disponível suficiente para a atividade celular.
A sequência está correta em
Provas
“A microbiologia industrial, também conhecida como biotecnologia microbiana ou biotecnologia industrial, é o campo da microbiologia voltado para a produção de componentes de interesses industriais, nos quais, em algum momento do processo, um micro-organismo é utilizado.” Diante do exposto, assinale a alternativa INCORRETA.
Provas
A maior parte dos carboidratos encontrados na natureza são polissacarídeos de médio a alto peso molecular. Os polissacarídeos diferem entre si pelo tamanho das cadeias, pela frequência de aparecimento das unidades dos monossacarídeos, pelo grau de ramificação, dentre outros fatores. Acerca das estruturas e funcionalidades dos polissacarídeos, assinale a alternativa correta.
Provas
“A cada dia torna-se mais visível a preocupação e a conscientização dos brasileiros com as questões ambientais. Recentemente, os meios de comunicação divulgaram a polêmica do uso de sacolas plásticas biodegradáveis e não biodegradáveis em supermercados e outros estabelecimentos comerciais. O material plástico utilizado para produzir estas sacolas é conhecido como polímero.” Acerca dos polímeros, assinale a afirmativa INCORRETA.
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
The utterance by Neal Cheatwood “We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans” in the indirect speech is
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
The word highlighted in “The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere,…” can be substituted, with no change of meaning, for
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
If the word “American” and the word “successful” were inserted in the phrase “the heat shield”, the right sequence of words would be
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
The “ch” in the word technology as in “… the technology have led to...” has the same sound of the word in, EXCEPT,
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
Match the two columns to classify the “ing forms” and mark the alternative which presents the right sequence.
1. “ing form” used as a verb.
2. “ing form” used as a noun.
3. “ing form” used as an adjective.
( ) “This demonstration flight goes a long way toward showing the value...”
( ) “Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras…”
( ) “… but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.”
( ) “We are pushing the boundaries with this flight.”
( ) “… the engineering research team is trying to outline the myriad potential uses for the heat shield,…”
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
In the sentence “… successful tests of the technology have led to speculation about its potential…”, the Present Perfect was used to express the idea of an action that
Provas
Caderno Container