Question 1

Which of the following is the correct way to write the scientific name for the domestic cat using binomial nomenclature?

Accepted Answer

Felis catus

Question 2

A scientist is studying the interactions between different species of fish, aquatic plants, and microorganisms in a lake, as well as the water chemistry and temperature. Which ecological level is the scientist primarily investigating?

Accepted Answer

Ecosystem

Question 3

Which of the following reactions is both catabolic and exergonic?

Accepted Answer

Hydrolysis of ATP to ADP and $$\mathrm{P_i}$$

Question 4

An atom of carbon-14 ($$^{14}\mathrm{C}) $$has an atomic number of 6 and a mass number of 14. How many neutrons does it have?

Accepted Answer

8

Question 5

Which of the following statements best describes isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 6

Which type of bond is primarily responsible for holding together the two strands of a DNA double helix?

Accepted Answer

Hydrogen bonds

Question 7

How many covalent bonds can a nitrogen atom typically form?

Accepted Answer

3

Question 8

A sodium ion ($$\mathrm{Na^+}) is an $$example of which of the following?

Accepted Answer

Cation

Question 9

Which functional group is present in all amino acids and acts as a base by accepting a hydrogen ion?

Accepted Answer

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

Question 10

A solution has a pH of 4. Compared to a solution with a pH of 7, how many times more acidic is it?

Accepted Answer

1000 times

Question 11

Which of the following is a polysaccharide used for energy storage in animals?

Accepted Answer

Glycogen

Question 12

Which level of protein structure is directly determined by the sequence of amino acids?

Accepted Answer

Primary structure

Question 13

Enzymes speed up chemical reactions by:

Accepted Answer

Decreasing the activation energy ($$E_a) $$required

Question 14

Which of the following correctly lists the reactants and products of aerobic cellular respiration?

Accepted Answer

Reactants: $$\mathrm{C_6H_{12}O_6$}$$ and $$\mathrm{O_2$}$$; Products: $$\mathrm{CO_2$}$$, $$\mathrm{H_2O}$$, and ATP

Question 15

Which of the following is a major structural difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotes have a nucleus; prokaryotes do not.

Question 16

Which of the following best describes the structure of the plasma membrane?

Accepted Answer

A double layer of phospholipids with proteins embedded throughout

Question 17

Which process requires energy input in the form of ATP to move sodium and potassium ions across the plasma membrane?

Accepted Answer

Active transport via the sodium/potassium pump

Question 18

During which stage of mitosis do sister chromatids separate and move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 19

A human somatic cell contains 46 chromosomes. After meiosis, how many chromosomes will each gamete contain?

Accepted Answer

23

Question 20

In a monohybrid cross between two heterozygous pea plants ($$Tt 	imes Tt$$), what is the expected genotypic ratio in the F2 generation?

Accepted Answer

1:2:1

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