Question 1

Which of the following is NOT one of the five fundamental characteristics of living organisms?

Accepted Answer

Ability to photosynthesize

Question 2

A scientist wants to test the effect of a new fertilizer on plant growth. Which of the following is the best example of a control group for this experiment?

Accepted Answer

Plants grown with no fertilizer added

Question 3

Which statement best describes a hypothesis in the scientific process?

Accepted Answer

A tentative explanation that can be tested

Question 4

Carbon atoms can form four covalent bonds because:

Accepted Answer

They have four electrons in their outer shell

Question 5

Which property of water allows it to moderate temperature in living organisms?

Accepted Answer

High specific heat capacity

Question 6

What type of bond holds the two strands of DNA together?

Accepted Answer

Hydrogen bond

Question 7

Which of the following molecules can be transported by simple diffusion across a cell membrane?

Accepted Answer

Carbon dioxide

Question 8

Why are phospholipids considered amphipathic molecules?

Accepted Answer

They have a hydrophilic head and hydrophobic tail

Question 9

Which of the following best explains why glucose has higher potential energy than carbon dioxide?

Accepted Answer

Glucose contains more hydrogen bonds

Question 10

Which level of protein structure is primarily stabilized by peptide bonds?

Accepted Answer

Primary structure

Question 11

A protein is denatured when:

Accepted Answer

It loses its functional three-dimensional shape

Question 12

Which of the following best describes the difference between passive and active transport?

Accepted Answer

Passive transport moves molecules down the concentration gradient without energy input

Question 13

What is the main function of cholesterol in cell membranes?

Accepted Answer

It helps maintain membrane fluidity

Question 14

Which of the following statements about the concentration gradient is correct?

Accepted Answer

It is created by a difference in solute concentrations

Question 15

Which of the following is a correct pairing of nitrogenous bases in DNA?

Accepted Answer

Cytosine–Guanine

Question 16

Which of the following best describes co-transport across a membrane?

Accepted Answer

One molecule moves down its gradient, providing energy for another to move against its gradient

Question 17

Which of the following is true about the difference between saturated and unsaturated fats?

Accepted Answer

Unsaturated fats have one or more double bonds and are liquid at room temperature

Question 18

Which of the following best explains why the plasma membrane is 'semi-permeable'?

Accepted Answer

It allows small molecules to pass but blocks larger ones

Question 19

Which of the following is a property of a well-designed experiment?

Accepted Answer

It manipulates the independent variable

Question 20

Which of the following bonds is most important for stabilizing the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

General Biology Exam I Study Guide: Foundations, Chemistry of Life, and Cell Membranes

Study Guide - Practice Questions

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