Question 1

Which of the following best describes why viruses are not always considered 'alive' according to the properties of life?

Accepted Answer

They cannot reproduce or carry out metabolism independently of a host cell.

Question 2

A scientist is studying how a population of wolves affects the population of deer in a forest. At what hierarchical level of biological organization is the scientist working?

Accepted Answer

Community

Question 3

Which of the following statements about the three domains of life is correct?

Accepted Answer

Fungi and plants are both in the domain Eukarya.

Question 4

In a controlled experiment testing the effect of fertilizer on plant growth, which of the following is the dependent variable?

Accepted Answer

The growth of the plants measured in height

Question 5

A solution with a pH of 5 is how many times more acidic than a solution with a pH of 9? (Use the formula $$	ext{Difference} = 10$$^{|pH_1 - pH_2|}$$)

Accepted Answer

$$10^4 = 10$$,000$$ times

Question 6

Which of the following best describes the difference between a hypothesis and a theory in science?

Accepted Answer

A hypothesis is a testable prediction, while a theory is a broad explanation supported by a large body of evidence.

Question 7

Which of the following best explains why water is an excellent solvent for many substances?

Accepted Answer

Water molecules are polar, allowing them to surround and separate ions and polar molecules.

Question 8

Which of the following statements about carbon is true and explains its unparalleled ability to form large, diverse molecules?

Accepted Answer

Carbon has four valence electrons and can form up to four covalent bonds.

Question 9

Which of the following best distinguishes between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons.

Question 10

A molecule of glucose ($$C_6H_{12}O_6$) is classified as which of the following?

Accepted Answer

A monosaccharide

Question 11

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

It builds polymers from monomers by removing a water molecule.

Question 12

Which of the following functional groups is hydrophobic?

Accepted Answer

Methyl group ($$-CH_3$)

Question 13

Which of the following best explains why cellulose is so strong and difficult for most animals to digest?

Accepted Answer

It is composed of unbranched chains of glucose with beta linkages, forming strong hydrogen bonds between chains.

Question 14

Which of the following best describes the structure of a phospholipid and its role in cell membranes?

Accepted Answer

It has a hydrophilic head and two hydrophobic tails, forming a bilayer in aqueous environments.

Question 15

Which of the following statements about protein structure is correct?

Accepted Answer

The primary structure of a protein is determined by the sequence of amino acids.

Question 16

Which of the following best describes the function of a buffer in a biological system?

Accepted Answer

It minimizes changes in pH by accepting or donating H$$^+$$ ions as needed.

Question 17

Which of the following is a correct statement about the relationship between monomers and polymers?

Accepted Answer

Polymers are large molecules made by joining many monomers together.

Question 18

Which of the following is NOT a function of proteins?

Accepted Answer

Storing genetic information

Question 19

Which of the following best describes the difference between qualitative and quantitative data?

Accepted Answer

Qualitative data are descriptive and non-numerical, while quantitative data are numerical and measurable.

Question 20

Which of the following best explains why correlation does not necessarily imply causation?

Accepted Answer

Because a third variable may be influencing both variables, or the relationship may be coincidental.

Biology Study Guide: Key Concepts and Step-by-Step Guidance

Study Guide - Practice Questions

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