Biology Questions

Q:

Cortisol is secreted by

A) Thyroid gland B) Pituitary gland
C) Adrenal gland D) Parathyroid gland
 
Answer & Explanation Answer: C) Adrenal gland

Explanation:
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Q:

Which describes the correct pairing of DNA bases?

A) guanine - cytosine B) adenine - cytosine
C) guanine - thymine D) thymine - cytosine
 
Answer & Explanation Answer: A) guanine - cytosine

Explanation:

The correct pairing of DNA bases among the given options is guanine - cytosine.

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Q:

In electro - magnetic radiation, which of the following has greater wave - length than visible light

A) Ultra -violet rays B) Infra - red rays
C) Cosmic rays D) x-rays
 
Answer & Explanation Answer: B) Infra - red rays

Explanation:
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Q:

What structure separates the colon from the small intestine?

what_structure_separates_the_colon_from_the_small_intestine1539329010.jpg image

A) ileocecal valve B) Epiglottis
C) Sphincter D) None of the above
 
Answer & Explanation Answer: A) ileocecal valve

Explanation:
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Q:

The gap between two communicating neurons is termed

A) Schwann cell B) Effector
C) Synaptic cleft D) Cell body
 
Answer & Explanation Answer: C) Synaptic cleft

Explanation:

A neuron or nerve cell is a cell that carries electrical impulses. Neurons are the basic units of the nervous system and its most important part is the brain. Every neuron is made of a cell body (also called a soma), dendrites and an axon. Dendrites and axons are nerve fibres.

 

The gap between two communicating neurons is termed Synaptic cleft.

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Q:

The process of bones increasing in width is known as

A) appositional growth B) closing of the epiphyseal plate
C) concentric growth D) long bones reaching adult length and width
 
Answer & Explanation Answer: A) appositional growth

Explanation:
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Q:

The Mode of nutrition in which particulate food is devoured is 

A) holozoic B) holophytic
C) saprophytic D) Parasitic
 
Answer & Explanation Answer: A) holozoic

Explanation:

The feeding mechanism is of several types. If it is entirely plant-like (photosynthesis),it is called holophytic. It is entirely (holo) animal-like (zoic), that is devouring already existing food, it is called holozoic.

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Q:

Which of the following statements best describes nutrient density?

A) Consume a variety of foods from MyPyramid's ±ve major food groups every day. B) Consume foods that have the most nutrition for their kcalories
C) Choose a number of diFerent foods within any given food group rather than the same old thing. D) All the above
 
Answer & Explanation Answer: B) Consume foods that have the most nutrition for their kcalories

Explanation:

Consume foods that have the most nutrition for their kcalories describes the Nutrient Density.

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