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Exam 4: A Tour of the Cell

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Question 1

Multiple Choice

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Your throat is dry, and you want the last cough drop in the box to last a long time in your mouth. What should you do?

A) Break the cough drop into little pieces and put them all in your mouth. Since each little piece must be dissolved separately, the drop will last longer.
B) Keep the cough drop whole. This maintains the largest surface-to-volume ratio and slows the dissolution of the cough drop.
C) Break the cough drop into little pieces and put them all in your mouth. This decreases the surface-to-volume ratio and slows the dissolution of the cough drop.
D) It doesn't matter if the cough drop is in one piece or many pieces; the total amount of cough drop is all that matters.

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Question 2

Multiple Choice

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Tay-Sachs disease

A) causes an accumulation of lipids in brain cells.
B) involves damage to liver cells.
C) is due to the absence of an enzyme that digests polysaccharides.
D) prevents the breakdown of glycogen.

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Question 3

Multiple Choice

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Which of the following statements about internal membranes in eukaryotic cells is false?

GPCRs are receptor proteins found in the plasma membrane that are important for cellular communication. What cellular structure makes GPCRs?

A basal body is

Much of the intracellular structure of a eukaryote cell is involved in protein synthesis. The accompanying figure shows the amounts of protein in cells at different parts of the cell cycle between two cell divisions. G₁ is a stage just after the cell has divided, and G₂ is the stage just before the cell divides again. S is a stage when the cell is synthesizing material such as DNA, mitochondria, and other organelles. -The protein measured in the cells was likely synthesized by

Which of the following statements about lysosomes is false?

The function of chloroplasts is

Insulin is a protein that is produced by pancreatic cells and secreted into the bloodstream. Which of the following options correctly lists the order of the structures through which insulin passes from its production to its exit from the cell?

Dynein feet

Skin cells are fastened into strong sheets by

Smooth endoplasmic reticulum

A woman is having trouble becoming pregnant. Examination of her partner's sperm indicates that dynein feet are missing from the flagella in his sperm cells. A physician explains that this could interfere with fertility by

A cell is exposed to a substance that prevents it from dividing. The cell becomes larger and larger. This situation

Much of the intracellular structure of a eukaryote cell is involved in protein synthesis. The accompanying figure shows the amounts of protein in cells at different parts of the cell cycle between two cell divisions. G1 is a stage just after the cell has divided, and G2 is the stage just before the cell divides again. S is a stage when the cell is synthesizing material such as DNA, mitochondria, and other organelles. -The data show that

________ cells lack a membrane-enclosed nucleus.

As cell size increases, the

A bacterial cell's DNA is found in its

Unlike animal cells, plant cells have ________ and ________. Unlike plant cells, animal cells have ________.

A drug that interferes with microtubule formation is likely to completely disrupt