Question 1

Which of the following best describes a hypothesis in the context of scientific inquiry?

Accepted Answer

A tentative explanation that can be tested by experiments or observations

Question 2

Which of the following is NOT a property shared by all living organisms?

Accepted Answer

Lack of organization

Question 3

Which of the following best describes the difference between a control group and an experimental group in a well-designed experiment?

Accepted Answer

The control group is not exposed to the independent variable, while the experimental group is.

Question 4

Which of the following is an example of a trace element essential for human life?

Accepted Answer

Iron

Question 5

What is the role of valence electrons in chemical bonding?

Accepted Answer

They participate in the formation of chemical bonds between atoms.

Question 6

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water molecules are polar and can surround and separate ions.

Question 7

Which of the following statements about acids and bases is correct?

Accepted Answer

Bases decrease the concentration of $$H^+$$ ions in solution.

Question 8

A solution has a pH of 4. What is the concentration of $$H^+$$ ions in the solution?

Accepted Answer

$$1 	imes 10$$^{-4}$$ M

Question 9

Which of the following best describes why carbon is so versatile in forming organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds with other atoms.

Question 10

Which of the following is a correct example of a dehydration reaction?

Accepted Answer

Linking two monosaccharides to form a disaccharide and releasing water

Question 11

Which of the following best describes the function of the mitochondria in eukaryotic cells?

Accepted Answer

ATP production through cellular respiration

Question 12

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 13

Which of the following best describes the function of ribosomes?

Accepted Answer

Protein synthesis

Question 14

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modification and packaging of proteins for secretion

Question 15

Which of the following best explains why phospholipids are important components of cell membranes?

Accepted Answer

They form a bilayer with hydrophilic heads facing outward and hydrophobic tails facing inward.

Question 16

Which of the following is a correct statement about hydrogen bonds?

Accepted Answer

They occur between a hydrogen atom and an electronegative atom like oxygen or nitrogen.

Question 17

Which of the following best describes the difference between a saturated and an unsaturated fatty acid?

Accepted Answer

Unsaturated fatty acids have one or more double bonds, causing kinks in the chain.

Question 18

Which of the following is a function of lysosomes in animal cells?

Accepted Answer

Digestion of macromolecules and recycling of cellular components

Question 19

Which of the following best describes the function of the cytoskeleton?

Accepted Answer

It provides structural support and facilitates cell movement.

Question 20

Which of the following statements about DNA and RNA is correct?

Accepted Answer

DNA stores genetic information, while RNA helps in protein synthesis.

General Biology I: Study Guide for Exam 1 (Chapters 1–4)

Study Guide - Practice Questions