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GRE BIOLOGY QUESTIONS AND ANSWERS EXAM
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  • GRE
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  • GRE

The relaxation of bronchial smooth muscle is stimulated by what type of neuron? A. Sympathetic preganglionic neurons B. Parasympathetic postganglionic neurons C. Sympathetic postganglionic neuron D. Parasympathetic motor neurons E. Somatic motor neurons Answer: C. Sympathetic postganglionic ...

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  • February 19, 2024
  • 10
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • gre biology questions and answers exam

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1. The relaxation of bronchial smooth muscle is stimulated by what type of
neuron?
A. Sympathetic preganglionic neurons
B. Parasympathetic postganglionic neurons
C. Sympathetic postganglionic neuron
D. Parasympathetic motor neurons
E. Somatic motor neurons
Answer: C. Sympathetic postganglionic neuron

2. Renin is most likely to drive the formation of angiotensin I from
angiotensinogen by doing which of the following?
3.

I. Increasing the concentration of angiotensinogen
II. Lowering the activation energy of the reaction from angiotensinogen
to angiotensin I
III. Stabilizing the angiotensin I molecule to lower the energy of the
products
A. II only
B. II and III only
C. I, II and III only
D. III only
E. I only
Answer: A. II only
3. α-amylase, found in saliva, plays a role in the digestion of what compounds?
A. Fats
B. Amino acids
C. Carbohydrates
D. Proteins
E. All
Answer: C. Carbohydrates

, 4. An individual presents to his physician with an abnormal breathing rhythm.
The physician suspects that the problem may be originating from his brain.
What part of his brain is most likely not functioning properly?

A. Midbrain
B. Medulla oblongata
C. Cerebellum
D. Hippocampus
E. Hypothalamus
Answer: B. Medulla oblongata
5. Skeletal muscle fibers are made up of white and red fibers. White fibers are
considered fast-twitch and red fibers are considered slow-twitch. Which of
these statements incorrectly describes a difference between white and red
fibers?
A. White fibers have less myoglobin than red fibers
B. White fibers fatigue more quickly than red fibers
C. White fibers utilize aerobic respiration more than red fibers
D. Red fibers have more mitochondria than red fibers
Answer: C. White fibers utilize aerobic respiration more than red fibers
6. What is the name of the structure that forms during development when the
embryo becomes a fluid filled ball?
A. Gastrula
B. Neurula
C. Blastocyst
D. Morula
Answer: C. Blastocyst

7. During embryogenesis, the process in which a committed cell develops
distinctive functions and characteristics is known as
A. Determination

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