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4 years ago

Complete the sentences to correctly describe steps in fatty acid synthesis.

1 answer:

kondor19780726 [428]4 years ago

3 0

Fatty acid synthesis begins with a preparatory step in which acteyl CoA is transferred from mitochondria to the cytoplasm. However, it cannot pass through the membrane, so it is transported as citrate, which is cleaved to acteyl CoA and oxaloacetate. In the cytosol, acetyl CoA is converted to malonyl CoA, a three-carbon compound. Fatty acid synthesis begins with the transfer of the acetyl group from acetyl CoA to fatty acid synthase. 3- carbon groups, supplied by malonyl ACP, are added to the growing acyl chain in a series of steps involving condensation, reduction, and dehydration reactions. Elongation of the fatty acid chain stops at 16 carbon atoms, after 7 cycles, as the free fatty acid is released.

Fatty acid synthesis is the process that uses end products of carbohydrate’s catabolism (acetyl CoA is produced from pyruvate, while pyruvate is produced by the oxidation of glucose in glycolysis) are converted to fatty acids. This process is reverse to β-oxidation.

Produced fatty acids can be esterified with glycerol to form the triacylglycerols that are then packaged in VLDL and secreted from the liver.

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What is the theory that states organisms best adopted for an environment are more likely to survive and reproduce?

kondaur [170]

Answer:

natural selection

Explanation:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

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3 years ago

masteringbio JFor each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employin

juin [17]

Incomplete question. The remaining part of the question read;

Words in the left column:

Yes
No
Observational
Manipulative

1. A physiologist incubates eggs in the lab at a range of temperatures to see what temperatures produce males and what temperatures produce females.

2. A biologist predicts that shade might influence ground temperature, and therefore turtle sex ratios. He records the sex ratio of turtle hatchlings in shaded and unshaded regions

3. An ecologist predicts turtles grow larger when no predators are around. She places turtles in an experimental pond system where half the ponds have predators and half the ponds have had the predators removed.

4. A climatologist predicts that concentration of CO2 in a city will be negatively correlated with the amount of wind in that city. He collects data and looks at the amount of CO2 in a city as a function of the wind speed in the city.

5. A sociologist conducts a survey in Hawaii to describe people's attitudes about global climate change.

6. A scientist determines the average wind speed, and variation in the amount of wind, in a number of locations to see which locations would be most suitable for wind turbines

Answer/Explanation:

1. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

We can make this conclusion here that the physiologists' research is hypothesis-driven since we are told he wanted to "see what temperatures produce males and what temperatures produce females." In other words, he wanted to know whether the temperature used in incubators can influence the sex of an egg by means of observation.

2. Hypothesis-driven? Yes!

Observational or Manipulative? Observation.

3. Hypothesis-driven? Yes!

Observational or Manipulative? Manipulative.

We can make the conclusion that is the ecologist used the manipulative method in her research since she decided to place the turtles in two different types of ponds; one where half the ponds have predators while in the other the pond the predators have been removed. In other words, she manipulated the independent variables.

4. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

Note, the use of the word, "predicts" in most instances underscores the tone of hypothesis-driven research, hence we can say Yes! And remember, we are told the researcher "collects data", meaning he is merely observing differences that occur naturally.

5. Hypothesis-driven? No!

Observational or Manipulative? Observational.

6. Hypothesis-driven? No!

Observational or Manipulative? Observational.

5 0

3 years ago

When colors are absorbed, the light changes into. ..

Anna71 [15]

Answer: a change in energy state occurs. The answer is dark or opaque - not able to be seen through.

Explanation:

The absorption of light makes an object dark or opaque to the wavelengths or colors of the incoming wave: Wood is opaque to visible light. Some materials are opaque to some wavelengths of light, but transparent to others. Glass and water are opaque to ultraviolet light, but transparent to visible light.

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3 years ago

Read 2 more answers

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Lynna [10]

Answer:

Explanation:

I may be wrong but I think it's D

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3 years ago

Name two factors that will determine whether a non native species becomes an invasive species

Artemon [7]