Question 1

Which of the following best describes the primary difference between DNA and RNA molecules?

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

Question 2

A scientist discovers a cell with the following features: a cell wall, chloroplasts, and a large central vacuole. Which type of cell is this most likely to be?

Accepted Answer

Plant cell

Question 3

Which of the following statements about phospholipids is correct?

Accepted Answer

Phospholipids form the main component of cell membranes due to their amphipathic nature.

Question 4

Which organelle is responsible for synthesizing proteins that are destined for secretion from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 5

A mutation causes a protein to misfold, disrupting its tertiary structure. Which level(s) of protein structure are most directly affected?

Accepted Answer

Tertiary structure, and possibly quaternary if the protein is multimeric

Question 6

Given the DNA sequence 5'-ATCGGTA-3', what is the complementary sequence and its polarity?

Accepted Answer

3'-TAGCCAT-5'

Question 7

Which of the following best explains why cells are generally small in size?

Accepted Answer

Smaller cells have a higher surface-area-to-volume ratio, allowing for more efficient exchange of materials with their environment.

Question 8

Which of the following is NOT a component of the endomembrane system?

Accepted Answer

Mitochondria

Question 9

A protein is synthesized by free ribosomes in the cytosol. Where is it most likely to function?

Accepted Answer

In the cytosol

Question 10

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

Modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles

Question 11

Which of the following equations correctly represents the surface-area-to-volume ratio for a spherical cell of radius $r$?

Accepted Answer

$\frac{4\pi r^2}{\frac{4}{3}\pi r^3}$

Question 12

Which of the following statements is true regarding prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus, while prokaryotic cells lack a nucleus.

Question 13

Which of the following is a function of nucleic acids in living organisms?

Accepted Answer

Storing genetic information

Question 14

A cell is observed to have a large number of mitochondria. What can you infer about the cell's function?

Accepted Answer

It requires a large amount of energy, such as a muscle cell.

Question 15

Which of the following best describes the quaternary structure of a protein?

Accepted Answer

The association of multiple polypeptide chains into a functional protein complex

Question 16

Which of the following is a steroid molecule commonly found in animal cell membranes?

Accepted Answer

Cholesterol

Question 17

Which organelle is found in plant cells but not in animal cells and is essential for photosynthesis?

Accepted Answer

Chloroplast

Question 18

A researcher isolates a molecule with a phosphate group, a pentose sugar, and a nitrogenous base. What type of molecule is this?

Accepted Answer

A nucleotide

Question 19

Which of the following best explains why the endomembrane system is considered a separate compartment within eukaryotic cells?

Accepted Answer

It consists of interconnected membranes that allow for specialized functions and transport within the cell.

Question 20

A protein is initially synthesized in the rough endoplasmic reticulum. Which of the following is a possible final destination for this protein?

Accepted Answer

The plasma membrane

General Biology Study Guide: Biomolecules, Cell Structure, and Function

Study Guide - Practice Questions

Study Guide - Flashcards