OAT OAT: General Biology Questions and Answers

Question 1

Which of the following is a primary function of Luteinizing Hormone (LH) in males?

Accepted Answer

Stimulation of Leydig cells to produce testosterone

Answer

Stimulation of sperm maturation in the epididymis

Answer

Inhibition of the hypothalamus from releasing GnRH

Answer

Stimulation of Sertoli cells to nourish sperm

Question 2

A biologist observes a mule, which is the offspring of a male donkey and a female horse. The mule is healthy and strong but is sterile. This is an example of which type of reproductive isolating mechanism?

Accepted Answer

Hybrid sterility

Answer

Gametic isolation

Answer

Hybrid breakdown

Answer

Hybrid inviability

Question 3

Which of the following conditions is NOT an assumption for a population to be in Hardy-Weinberg equilibrium?

Accepted Answer

Small population size

Answer

Random mating

Answer

No natural selection

Answer

No gene flow

Question 4

In the process of eutrophication, what is the direct cause of the depletion of dissolved oxygen in the water, leading to the creation of a 'dead zone'?

Accepted Answer

The decomposition of dead algae by aerobic bacteria.

Answer

The rapid consumption of oxygen by a large algal bloom during photosynthesis.

Answer

The release of toxins from the algae that directly consume oxygen.

Answer

The increased water temperature caused by the dense algal mat on the surface.

Question 5

At the neuromuscular junction, the arrival of an action potential at the motor neuron's terminal button triggers the release of which neurotransmitter into the synaptic cleft?

Accepted Answer

Acetylcholine

Answer

Dopamine

Answer

Serotonin

Answer

Norepinephrine

Question 6

A patient suffers an injury that severs a structure connecting a muscle to a bone. Which of the following has most likely been damaged?

Accepted Answer

A tendon

Answer

A ligament

Answer

Cartilage

Answer

A fascicle