Tag: biology

Questions Related to biology

Which is not part of brain stem

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. Cerebrum

  2. Medulla oblongata

  3. Pons varolii

  4. Corpora quadrigemina

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Correct Option: A

Cerebrum is part of

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. Mesencephalon

  2. Metencephalon

  3. Prosencephalon

  4. Myelencephalon

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Correct Option: C

Activities like running, talking and typing are controlled by 

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. Cerebellum

  2. Pons

  3. Medulla oblongata

  4. Mid brain

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Correct Option: A

Salivation is under control of

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. Cerebellum

  2. Hypothalamus

  3. Medulla oblongata

  4. Mesencephalon

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Correct Option: C

If medulla oblongata is destroyed then which of the following functions will be affected?

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. No thermoregulation

  2. No vision

  3. No response when prickled with needles

  4. No memory

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Correct Option: C

In human brain two hemispheres are connected by bundle of fiber which is know as _______________.

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. Medulla oblongata

  2. Cerebrum

  3. Cerebellum

  4. Corpus callosum

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Correct Option: D

Choose the correct answer from the alternatives given.
To which of the following organ/blood is supplied by the internal carotid artery?

biology human brain and sense organs the brain nervous system in humans central nervous system

  1. Kidney

  2. Liver

  3. Heart

  4. Brain

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Correct Option: D
Explanation:

The brain forms only 2% of the body but uses up to 20% of the oxygen. It is given the top priority during the distribution of oxygen-rich blood. The internal carotid arteries and vertebral arteries carry oxygen-rich blood from the heart to the brain. 

So, the correct option is 'Brain'.

Which one of the following pairs is not correctly matched?

biology classification and variation dna - history and structure biotechnology commercial applications of biotechnology

  1. Plasmid - small piece of extrachromosomal DNA in bacteria.

  2. Interferon - an enzyme that helps in DNA replication.

  3. Cosmid - a vector for carrying large DNA fragments into host cells.

  4. Myeloma - tumour cells.

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Correct Option: B
Explanation:

Interferons (IFNs) are proteins made and released by virally infected host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells to protect the adjacent cells from the infection by interfering the DNA replication of the virus in the host cell. So, the correct answer is option B.

The name of drug used in cancer treatment produced by biotechnology is

biology classification and variation dna - history and structure biotechnology commercial applications of biotechnology

  1. Interferon

  2. HGH

  3. TSH

  4. Insulin

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Correct Option: A
Explanation:

Interferons are produced by the body cells as a defensive response to viruses. These belong to the group known as cytokines. Type II interferon is secreted only by natural killer cells and T lymphocytes, its main purpose is to signal the immune system to respond to infectious agents or cancerous growth. So, the correct answer is option A.

Interferon is the body's first line of defense against ............... infection

biology classification and variation dna - history and structure biotechnology commercial applications of biotechnology

  1. Viral

  2. Bacterial

  3. Protozoan

  4. All of the above

Show answer
Correct Option: A
Explanation:

Interferons (IFNs) belong to the large class of proteins known as cytokines, molecules used for communication between cells to trigger the protective defences of the immune system that help eradicate pathogens. Interferons are named for their ability to interfere with viral replication by protecting cells from virus infections. 

Therefore, the correct answer is option A.