OAT Biology Practice Test

Question 1

All of these play an important role in human respiration EXCEPT

Accepted Answer

A decrease in the amount of O2 in the blood

Answer

A decrease in the plasma pH level

Answer

An increase in the amount of CO2 in the blood

Answer

They all play a role

Question 2

Animal cells vary from plant cells in that they have

Accepted Answer

Centrioles within centrosomes

Answer

Lysosomes

Answer

A cell wall made of cellulose

Answer

Large vacuoles that store water

Question 3

The liver is an important organ that performs all of the functions listed below. EXCEPT

Accepted Answer

Breaking down peptides into amino acids

Answer

Detoxifying harmful substances such as alcohol or certain drugs

Answer

Storage of glycogen to be used as fuel in the body

Answer

Storing amino acids that were absorbed in the capillaries of the small intestine

Question 4

A symbiotic relationship is defined as which of the following?

Accepted Answer

Remora fish eat parasites off of sharks; the sharks stay free of parasites, and the remora fish are protected from predators

Answer

A cat is no longer startled after hearing the door open multiple times every day

Answer

A tapeworm feeds off of its host's nutrients causing the host to lose large amounts of weight

Answer

Meerkats sound alarm calls to warn other meerkats of predators

Question 5

Calypso bulbosa, the Calypso Orchid, grows in close proximity to mycorrhizal fungi. The fungus infiltrate the flower's 
roots and take use of the plant's food supply. Rare minerals, such as phosphates, are concentrated in the roots by the 
fungi and made readily available to the orchid. This is an example of

Accepted Answer

Mutualism

Answer

Parasitism

Answer

Endosymbiosis

Answer

Commensalism

Question 6

Which of the following in cells may catalyze hydrogen peroxide processes, provide cellular energy, and create 
proteins in that order?

Accepted Answer

Peroxisomes, mitochondria, and ribosomes

Answer

Peroxisomes, mitochondria, and Golgi apparatus

Answer

Lysosome, ribosome, mitochondria

Answer

Peroxisomes, mitochondria, and lysosomes

Question 7

Which of the following is NOT true about meiosis?

Accepted Answer

Sister chromatids separate during meiosis I

Answer

Homologous chromosomes join during synapsis

Answer

Crossing-over increases genetic variation in gametes

Answer

None of the above

Question 8

Which of the following characteristics of arteries is correct?

Accepted Answer

They carry blood away from the heart

Answer

The Superior Vena Cava is an example of an artery

Answer

They are thin-walled blood vessels

Answer

They always carry oxygenated blood

Question 9

A change in the membrane potential of a neuron from +50 to -70 millivolts is considered

Accepted Answer

Repolarization

Answer

Post-Synaptic Inhibition

Answer

Hyperpolarization

Answer

Action Potential

Question 10

Which of the following factors has the greatest impact on a population's genetic variability?

Accepted Answer

Answer

D) Vegetative propagation