Question 1

Which of the following statements correctly distinguishes prokaryotic cells from eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus surrounded by a membrane, whereas prokaryotic cells lack a true nucleus.

Question 2

Which of the following is NOT considered a characteristic of living organisms?

Accepted Answer

Ability to move voluntarily

Question 3

Arrange the following levels of biological organization from simplest to most complex: cell, organ, tissue, organism.

Accepted Answer

Cell, tissue, organ, organism

Question 4

Which of the following best describes negative feedback regulation in biological systems?

Accepted Answer

A process that reduces the initial stimulus, helping maintain homeostasis.

Question 5

Which experiment provided evidence against the theory of spontaneous generation?

Accepted Answer

Redi's experiment with covered and uncovered meat jars

Question 6

Which of the following elements is NOT one of the four most essential elements for life?

Accepted Answer

Phosphorus

Question 7

Atoms are considered stable when:

Accepted Answer

Their outermost electron shell is full.

Question 8

Which type of chemical bond involves the sharing of electrons between atoms?

Accepted Answer

Polar covalent bond

Question 9

Which property of water allows ice to float on liquid water?

Accepted Answer

Ice is less dense than liquid water because its molecules form a crystalline lattice.

Question 10

A buffer solution resists changes in pH by:

Accepted Answer

Releasing or absorbing hydrogen ions ($$\mathrm{H^+})$$

Question 11

Which functional group is present in amino acids and is responsible for their basic properties?

Accepted Answer

Amino group ($$-\mathrm{NH_2$})$$

Question 12

Which of the following best describes the difference between dehydration synthesis and hydrolysis?

Accepted Answer

Dehydration synthesis builds polymers by removing water, while hydrolysis breaks polymers by adding water.

Question 13

Which statement about hydrogenated vegetable oil is correct?

Accepted Answer

It is produced by adding hydrogen to unsaturated fats, making them more solid at room temperature.

Question 14

The Central Dogma of Genetics describes:

Accepted Answer

The flow of genetic information from DNA to RNA to protein

Question 15

Which of the following is a correct balanced chemical equation for the formation of water from hydrogen and oxygen?

Accepted Answer

$$2\mathrm{H_2$} + \mathrm{O_2$} \rightarrow 2\mathrm{H_2O}$$

Question 16

Which of the following is an example of a structural isomer?

Accepted Answer

Two molecules with the same molecular formula but different connectivity of atoms

Question 17

Which macromolecule is composed of monosaccharide monomers?

Accepted Answer

Carbohydrates

Question 18

A scientist wants to test the effect of sunlight on plant growth. Which is the independent variable in this experiment?

Accepted Answer

Amount of sunlight

Question 19

Which of the following best explains why water is an excellent solvent for ionic compounds?

Accepted Answer

Water molecules are polar and can surround and separate ions due to their partial charges.

Question 20

Which of the following is a greenhouse gas that contributes to the greenhouse effect?

Accepted Answer

Carbon dioxide ($$\mathrm{CO_2$})$$

General Biology: Foundations, Chemistry, and Cell Structure Study Guide

Study Guide - Practice Questions