CLEP Practice Test Biology

Question 1

Farm runoff washes fertilizer into a pond, causing increased algal growth, decreased oxygen, and eventually the death of the fish.
Which of the following processes best describes this sequence of events?

Accepted Answer

Eutrophication

Answer

Denitrification

Answer

Primary succession

Answer

Autotrophy

Question 2

Dogs, bats, whales, and humans all have a long bone in their front limbs that is attached to two parallel bones at a joint. Anatomical structures such as these are referred to as

Accepted Answer

Homologous

Answer

Fulfilling the same function

Answer

Vestigial

Answer

Analogous

Question 3

Why is it likely that a single nucleotide substitution of uracil for thymine in a DNA strand's coding region will have little effect on the organism?

I. Uracil and thymine nucleotides will both bind to adenosine
II. The genetic code is duplicative
III. Single nucleotide substitutions rarely have a significant impact
IV. Because uracil is not normally found in DNA, the substitution is likely to be detected and repaired.

Accepted Answer

I and IV

Answer

II and III

Answer

I only

Answer

IV only

Question 4

In humans, what is the end result of anaerobic respiration?

Accepted Answer

Lactic acid

Answer

Carbon dioxide and ethanol

Answer

Carbon dioxide

Answer

Humans are unable to perform anaerobic respiration.

Question 5

Chyme is a semi-fluid mass of partially digested food. Chyme formation takes place in

Accepted Answer

Stomach

Answer

Liver

Answer

Large intestine

Answer

Small intestine

Question 6

During the metabolization of glucose molecules in an aerobic cell, the energy is used to produce ATP through a series of biochemical steps. Put these events in the correct order.

I. Acetyl Coenzyme A is synthesized from pyruvate.
II. Electron carriers in the mitochondrion donate electrons to the electron transport chain, resulting in a proton gradient.
III. A molecule enters the citric acid cycle, also known as the Krebs cycle, producing 3 NADH, 1 FADH2, and 1 ATP.
IV. During glycolysis, a molecule is cleaved into two parts, giving NADH molecules and two ATP molecules.
V. ATP synthase allows protons into the mitochondrion's interior matrix, producing up to 34 ATP.

Accepted Answer

IV, I, III, II, V

Answer

IV, III, I, II, V

Answer

II, I, III, IV, V

Answer

II, III, I, V, IV

Question 7

Which of the following bacteria is an example of denitrifying bacteria?

Accepted Answer

Pseodomonas sp

Answer

Rhizobium sp

Answer

Nitrobacter sp

Answer

Nitrosomonas sp

Question 8

What is Engrailed proteins?

Accepted Answer

Transcription factors

Answer

Carrier proteins

Answer

Tethering proteins

Answer

Signaling molecules

Question 9

Which of the following cellular organelles are more likely to be present in a cell that produces steroid hormones?

Accepted Answer

Smooth endoplasmic reticulum

Answer

Lysosomes

Answer

Mitochondria

Answer

Rough endoplasmic reticulum

Question 10

What is the process by which the endosperm of a flowering plant's seeds is produced?

Accepted Answer

Two sperm enter the pollen tube and travel to the embryo sa. The one fertilizes the egg, while the other fertilizes the two polar nuclei, resulting in triploid endosperm.

Answer

Endosperm is produced entirely by maternal cells and does not require fertilization.

Answer

Two sperm enter the pollen tube and travel to the embryo sa. The one fertilizes the egg, while the other fertilizes a polar nucleus, resulting in diploid endosperm.

Answer

The zygote divides into two. One of these cells generates the embryo, while the other generates the endosperm.

Farm runoff washes fertilizer into a pond, causing increased algal growth, decreased oxygen, and eventually the death of the fish.Which of the following processes best describes this sequence of events?

Farm runoff washes fertilizer into a pond, causing increased algal growth, decreased oxygen, and eventually the death of the fish.
Which of the following processes best describes this sequence of events?