Biology Questions

Q:

Hypnosis is sometimes used to treat anxiety disorders.

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

Explanation:

Hypnosis is a state of human consciousness involving focused attention, reduced peripheral awareness, and an enhanced capacity to respond to suggestion.

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Q:

The basic unit of the nervous system is the

A) Lymphs B) Nephrons
C) Nerves D) Neurons
 
Answer & Explanation Answer: D) Neurons

Explanation:

The basic unit of the nervous system is the Neurons.

 

The neuron is a single nerve cell, and you have billions of them.

There are three basic types of neurons::

1. Association,

2. Afferent  and

3. Efferent.

The association neurons comprise the central nervous system (CNS) that is the brain and spinal cord.

The afferent neurons are also known as the sensory neurons, they bring the stimuli from the sensors (e.g., skin, eyes, ears) to the CNS.

The efferent neurons are also known as motor neurons, they bring the responses from the brain to the muscles and the glands.

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Q:

The two purines in DNA are

A) Adenine & Thymine B) Thymine & Uracil
C) Guanine & Uracil D) Adenine & Guanine
 
Answer & Explanation Answer: D) Adenine & Guanine

Explanation:

The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.

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Q:

Which part of the respiratory system does emphysema damage?

A) Nose B) Lungs
C) Trachea D) Mouth
 
Answer & Explanation Answer: B) Lungs

Explanation:

Emphysema is a condition that involves damage to the walls of the air sacs (alveoli) of the lung i.e, primarily causes shortness of breath due to over-inflation of the alveoli.

 

First, emphysema causes holes to gradually form inside the lungs' air sacs, thereby weakening their internal structure and inhibiting the exchange of oxygen and carbon dioxide.

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Q:

Bacteria divide by

A) Binary Fusion B) Cytokinesis
C) Binary Fission D) Both B & C
 
Answer & Explanation Answer: C) Binary Fission

Explanation:

Most bacteria divide by binary fission, a form of cell division in which DNA replication and segregation occur simultaneously. This process involves active partitioning of the single bacterial chromosome and positioning of the site of septation.

 

Bacteria reproduce by binary fission. In this process the bacterium, which is a single cell, divides into two identical daughter cells.

 

Binary fission begins when the DNA of the bacterium divides into two replicates. The bacterial cell then elongates and splits into two daughter cells each with identical DNA to the parent cell. Each daughter cell is a clone of the parent cell.

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Q:

The DASH Diet plan was devised to prevent

A) TB B) Thyroid
C) Hypertension D) Diabetes
 
Answer & Explanation Answer: C) Hypertension

Explanation:

he DASH Diet plan was devised to prevent high blood pressure i.e, hypertension.

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Q:

Sugar is a component of which of the following?

A) Lipids B) Nucleic acids
C) Carbohydrates D) Both B & C
 
Answer & Explanation Answer: C) Carbohydrates

Explanation:

Sugar is a component of Carbohydrates.

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Q:

The oval window is connected directly to which passageway?

A) scala tympani B) external auditory meatus
C) scala vestibuli D) pharyngotympanic tube
 
Answer & Explanation Answer: C) scala vestibuli

Explanation:

The oval window is connected directly to scala vestibuli.

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