Question 1

Which of the following best describes an 'emergent property' in biological systems?

Accepted Answer

A property that arises from the arrangement and interaction of parts within a complex system.

Question 2

Which of the following correctly lists the levels of biological organization from smallest to largest?

Accepted Answer

Molecule, cell, tissue, organ, organism, ecosystem

Question 3

Which four elements make up approximately 96% of living matter?

Accepted Answer

Carbon, hydrogen, oxygen, nitrogen

Question 4

Why do polar covalent bonds result in molecules with partial charges?

Accepted Answer

Because electrons are shared unequally, causing one atom to be more electronegative.

Question 5

Which of the following functional groups is found in amino acids and acts as a base?

Accepted Answer

Amino group

Question 6

A protein's tertiary structure is primarily stabilized by which of the following interactions?

Accepted Answer

Interactions between R groups, including hydrogen bonds, ionic bonds, hydrophobic interactions, and disulfide bridges

Question 7

Which of the following statements about prokaryotic and eukaryotic cells is correct?

Accepted Answer

Eukaryotic cells have a nucleus, while prokaryotic cells do not.

Question 8

Which of the following best explains why the sodium-potassium pump is considered an example of active transport?

Accepted Answer

It requires ATP to move ions against their concentration gradients.

Question 9

Which of the following is a correct description of the role of ATP in cellular metabolism?

Accepted Answer

ATP stores energy in its phosphate bonds and releases it to drive endergonic reactions.

Question 10

During cellular respiration, which process produces the most ATP?

Accepted Answer

Oxidative phosphorylation

Question 11

Which of the following best describes the function of capillary beds in the circulatory system?

Accepted Answer

They are the site of exchange of gases, nutrients, and wastes between blood and tissues.

Question 12

Which hormone is released by the pancreas to lower blood glucose levels, and what is its primary target?

Accepted Answer

Insulin; liver and muscle cells

Question 13

Which of the following is a correct sequence of events in a typical signal transduction pathway?

Accepted Answer

Reception → Transduction → Response

Question 14

Which of the following best explains why oxygen is required for aerobic cellular respiration?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain.

Question 15

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for a reaction to proceed.

Question 16

A patient is unable to digest fats due to a lack of bile production. Which organ is most likely malfunctioning?

Accepted Answer

Liver

Question 17

Which of the following best describes the difference between exocytosis and endocytosis?

Accepted Answer

Exocytosis releases substances from the cell, while endocytosis brings substances into the cell.

Question 18

Which of the following is a correct statement about the cardiac cycle in humans?

Accepted Answer

Systole refers to the contraction phase, and diastole refers to the relaxation phase.

Question 19

Which of the following best explains why a mutation in the gene encoding an ion channel protein could affect nerve impulse transmission?

Accepted Answer

Ion channels regulate the movement of ions across the membrane, which is essential for generating action potentials.

Question 20

Which of the following is a correct description of facilitated diffusion?

Accepted Answer

Movement of molecules down their concentration gradient through a membrane protein, without energy input.

General Biology I: Comprehensive Study Notes (Units 1-3)

Study Guide - Practice Questions