Mars Case

Who was/were the first to propose that cell membranes are phospholipid bilayers?

Answer

Selected Answer: E. E. Gorter and F. Grendel

* Question 2

1 out of 1 points

Which of these often serve as receptors or cell recognition molecules on cell surfaces?

Answer

Selected Answer: E. glycoproteins

* Question 3

1 out of 1 points

Which of the following is a reasonable explanation for why unsaturated fatty acids help keep any membrane more fluid at lower temperatures?

Answer

Selected Answer: A. The double bonds form kinks in the fatty acid tails, forcing adjacent lipids to be further apart.

* Question 4

0 out of 1 points

The following questions are based on the reaction A + B C + D shown in Figure 8.2.

Figure 8.2

Which of the following represents the G of the reaction?

Answer

Selected Answer: A. a

* Question 5

1 out of 1 points

Why is ATP an important molecule in metabolism?

Answer

Selected Answer: B. It provides energy coupling between exergonic and endergonic reactions.

* Question 6

1 out of 1 points

In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions in this compartmentalization?

Answer

Selected

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