$$\text{Surface Area} = 4 \pi r^2$

Question 1

Which of the following best describes the difference between dehydration synthesis and hydrolysis reactions in biological systems?

Accepted Answer

Dehydration synthesis joins monomers to form polymers by removing water, while hydrolysis breaks polymers into monomers by adding water.

Question 2

Which equation correctly represents the process of photosynthesis in chloroplasts?

Accepted Answer

$$6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \mathrm{O}_2$$

Question 3

A scientist is comparing the structure of prokaryotic and eukaryotic cells. Which feature is unique to eukaryotic cells?

Accepted Answer

Compartmentalization by membrane-bound organelles

Question 4

Which of the following statements about saturated and unsaturated fats is correct?

Accepted Answer

Saturated fats have no double bonds and are usually solid at room temperature.

Question 5

Which of the following best explains why cell fractionation is a useful technique in cell biology?

Accepted Answer

It separates cellular components so their individual functions can be studied.

Question 6

A mutation changes a hydrophobic amino acid in a membrane protein to a hydrophilic one. What is the most likely effect on the protein's function?

Accepted Answer

The protein may misfold or fail to integrate properly into the membrane.

Question 7

Which of the following is a correct description of the structure of a nucleotide?

Accepted Answer

A nucleotide consists of a phosphate group, a pentose sugar, and a nitrogenous base.

Question 8

Which of the following best describes the function of the rough endoplasmic reticulum (ER)?

Accepted Answer

Protein synthesis and modification due to ribosomes attached to its surface

Question 9

A cell is placed in a solution with a higher concentration of solutes than the cell's cytoplasm. What will happen to the cell?

Accepted Answer

Water will move out of the cell, causing it to shrink.

Question 10

Which of the following equations correctly represents the relationship between surface area and volume for a spherical cell?

Accepted Answer

$$	ext{Surface Area} = 4 \pi r^2$

Question 11

Which process is responsible for moving large molecules such as proteins into a cell?

Accepted Answer

Endocytosis

Question 12

Which of the following statements about the fluid mosaic model of membrane structure is correct?

Accepted Answer

Membranes consist of a phospholipid bilayer with proteins embedded and able to move laterally.

Question 13

Which of the following is a function of microtubules in eukaryotic cells?

Accepted Answer

Providing tracks for organelle movement and forming the mitotic spindle during cell division

Question 14

Which of the following best explains why phospholipids form bilayers in aqueous environments?

Accepted Answer

Phospholipids have hydrophilic heads and hydrophobic tails, causing them to arrange with heads facing water and tails facing inward.

Question 15

Which of the following is a correct statement about the role of enzymes in biological reactions?

Accepted Answer

Enzymes decrease the activation energy, speeding up chemical reactions.

Question 16

A cell with a defective sodium-potassium pump would have difficulty maintaining which of the following?

Accepted Answer

Osmotic balance and membrane potential

Question 17

Which of the following best describes the difference between free and bound ribosomes?

Accepted Answer

Free ribosomes synthesize proteins for use within the cytosol, while bound ribosomes synthesize proteins destined for membranes or secretion.

Question 18

Which of the following is a major function of membrane carbohydrates?

Accepted Answer

Cell-cell recognition

Question 19

Which of the following processes requires energy input from the cell?

Accepted Answer

Active transport

Question 20

Which of the following best describes the three-dimensional structure of DNA?

Accepted Answer

A double helix with complementary base pairing between strands

Study Guide: Structure and Function of Large Biological Macromolecules, Cell Structure, and Membrane Function

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