Biology Questions

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:

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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Q:

Most foodborne illnesses are treatable.

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

Explanation:

Some common foodborne illness are like vomiting, diarrhea, fever, chills and abdominal pain. These all are acute i.e, they last for only some time and be cured without medication and some times by medication.

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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:

Which of the following would cause gene flow?

A) Individuals moving into population B) Genetic drift
C) Mutation D) Artificial selection
 
Answer & Explanation Answer: A) Individuals moving into population

Explanation:

Gene flow means migration of genes from one to another. This gene flow is caused by individuals moving into population.

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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:

The inner most membrane that covers the brain is

A) Pleura B) Duramater
C) Pia - mater D) Arachnoid membrane
 
Answer & Explanation Answer: C) Pia - mater

Explanation:
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Q:

Impulse conduction is fastest in neurons that are

A) Myelinated B) Motor
C) Unmyelinated D) Sensory
 
Answer & Explanation Answer: A) Myelinated

Explanation:

A myelinated nerve can be found int the brain or spinal cord as well as the peripheral nervous system, it is white and is surrounded by schwann cells or oligodendrocytes.

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