Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

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

  1. No thermoregulation

  2. No vision

  3. No response when prickled with needles

  4. No memory
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The medulla oblongata controls vital autonomic functions. If destroyed, the body loses the ability to maintain these involuntary processes. The option regarding the prick reflex is the most commonly cited consequence in this context.

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

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

  1. Kidney

  2. Liver

  3. Heart

  4. Brain
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Which one of the following pairs is not correctly matched?

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Interferon

  2. HGH

  3. TSH

  4. Insulin
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Viral

  2. Bacterial

  3. Protozoan

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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.