Biology Questions

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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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:

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:

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:

Which of the following cannot add fat to the body?

A) Vitamins B) Carbohydrates
C) Water D) Proteins
 
Answer & Explanation Answer: C) Water

Explanation:

A nutrient is a substance used by an organism to survive, grow, and reproduce. These are compounds in foods essential to life and health, providing us with energy.

There are two types of nutrients:

1. Organic Nutrients
2. Inorganic Nutrients

 

Carbohydrates (CHO), Lipids (fats), Proteins and Vitamins come under organic nutrients as they contain carbon. These can add fat to the body.

 

Minerals and Water come under inorganic nutrients as they lack in carbon. These cannot add fat to the body.

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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 is/are the function(s) of bile juice released from the liver?

 

I. Make the food coming from stomach alkaline.

II. Conversion of proteins into amino acids.

III. Break down of fats into smaller globules.

 

A) Only I   B) Only II and III  
C) Only I and III   D) All I, II and III  
 
Answer & Explanation Answer: C) Only I and III  

Explanation:
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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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