Biology Questions

Q:

Antigens 'A' and 'B' are absent in persons belong to blood group

A) 'O' B) 'A'
C) 'B' D) 'AB'
 
Answer & Explanation Answer: A) 'O'

Explanation:
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Q:

The arbor vitae refers to

A) the pleatlike convolutions of the cerebellum B) cerebellar gray matter
C) flocculonodular nodes D) cerebellar white matter
 
Answer & Explanation Answer: D) cerebellar white matter

Explanation:

In the brain cerebellum, the arbor vitae refers to the cerebellar white matter which resembles the structure of arborvitae plant leaves and branches structure.

arbor-vitae1540288058.png image

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Q:

Nitrogenous Food is

A) Proteins B) Carbohydrates
C) Salts D) Lipids
 
Answer & Explanation Answer: A) Proteins

Explanation:

Here the Nitrogenous Food is Proteins.

Nitrogenous Food ::

The animal body is more than a machine. It requires fuel to enable it not only to work but also to live, even without working. A part of the food eaten must go to maintain the body

Nitrogenous food compounds are sometimes classed together under the name of proteins. These may be divided into proteids, gelatinoids, and extractives.

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Q:

Sleeping sickness in man is caused by the organism

A) plasmodium B) entamoeba
C) giardia D) trypanosoma
 
Answer & Explanation Answer: D) trypanosoma

Explanation:

Trypanosoma is a protozoan animal. It lives as a parasite in the blood and later invades the cerebrospinal fluid to cause the sleeping sickness. This parasite is transmitted by the Tsetse fly.

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Q:

Who discovered the monomers of nucleic acids?

A) James Watson, Francis Crick, and Rosalind Franklin B) Friedrich Miescher
C) Phoebus Levene D) Gerardus Johannes Mulder and Jöns Jacob Berxelius
 
Answer & Explanation Answer: C) Phoebus Levene

Explanation:

Deoxyribonucleic acid (DNA) is a nucleic acid polymer composed of monomers called nucleotides. Nucleotides are composed of three components: (1) a pentose sugar; (2) a nitrogenous base; and (3) one to three phosphate groups.

Phoebus Levene, a Russian biochemist was the first to discover the nucleotide and the first to correctly identify the way nucleic acid molecules, DNA.

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Q:

Improving muscular strength and endurance slows bone density loss.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

2928muscle_strength1540977766.jpg image


Improving muscular strength and endurance slows bone density loss.

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Q:

Reuptake refers to the

A) reabsorption of excess neurotransmitter molecules by a sending neuron B) release of hormones into the bloodstream
C) movement of neurotransmitter molecules across a synaptic gap D) inflow of myelin through an axon membrane
 
Answer & Explanation Answer: A) reabsorption of excess neurotransmitter molecules by a sending neuron

Explanation:

Reuptake refers to the process in the brain of neurons to retrieve chemicals that were not received by the next neuron. Neurons are cells in the brain that have miniscule spaces between them. They communicate with each other by sending chemicals across the space to the next neuron.

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Q:

Both food and air travel through the

A) pharynx B) trachea
C) larynx D) alveolus
 
Answer & Explanation Answer: A) pharynx

Explanation:

The pharynx is a passageway shared by both food and air.

 

Both_food_and_air_travel_through_the1562568925.png image

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