MCQ on Cell signaling: Introduction and Explanation

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Cell signaling refers to the process through which the cells communicate with the other cells present in the body or the with their external environment. It occurs through various pathways. The multicellular organisms perform cell signaling in order to regulate various functions such as nerve cells in the body coordinating with the muscle cells to help in the movement of the body. There are three stages of cell signaling which are:

Binding of the signal molecule to a receptor
Activation of chemical signals through enzymes, signal transduction
At last, the response is seen

The pathways of cell signaling are either biochemical or mechanical. Cell signaling molecules are of various types such as Intracrine ligands, Endocrine ligands, Paracrine ligands, Autocrine ligands, and Juxtacrine ligands.

Ques 1. Which type of cell signaling molecule produces hormones?

Autocrine ligands
Endocrine ligands
Juxtacrine ligands
Intracrine ligands

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Ans. b) Endocrine ligands

Explanation: Endocrine ligands are the type of cell signaling molecule that produces hormones directly into the blood. These hormones reach all other parts of the body through the flow of the blood. The signaling specificity can be controlled here as only some of the cells can respond to a given stimulus or hormone.

Read More: Stress Hormones

Ques 9. Out of the following, which G protein takes an active part to regulate vision?

Gs family
Go family
Gt family
Gq family

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Ans. c) Gt family

Explanation: Gt or transducin is the g-protein that takes part in regulating vision activities. Transducin is trimeric in nature. These coupled receptors are found in the rods and cones in the eyes. They encode a stimulus of light as a chemical signal. The two types of photoreceptors in the eyes are rods and cones.

Ques 10. What is the largest family of cell surface receptors?

G protein-coupled receptors, GPCR
Ion channel receptor
Nuclear receptor
Enzyme-linked receptor

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Ans. a) G protein-coupled receptors, GPCR

Explanation: GPCR or G protein-coupled receptors are the largest cell surface receptors, family. They are functionally and structurally similar proteins. They are characterized by seven alpha spanning helix.

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MCQ on Cell signaling: Introduction and Explanation

CBSE CLASS XII Related Questions

1.
In vitro fertilization (IVF) is a popular method these days that is helping childless couples to bear a child.
Write the different steps that are carried out in this technique.
Would you consider gamete intra fallopian transfer as a type of IVF? Justify your answer.

2.
Oogenesis is a discontinuous process that begins before birth and is completed after puberty.
Trace the development of a gamete mother cell till its release from the ovary during ovulation.
Name the two pituitary hormones that play an important role in the process.

3.
Work out the crosses between:
Normal female and Haemophilic male
Carrier female and Normal male
(III) Carrier female and Haemophilic male
Write the conclusions you draw from these crosses. Comment on the type of inheritance of the disease.
(Use: $X$ - Normal, $X^h$ - Haemophilic)

4.
Suggest how a virus-free healthy plant can be obtained from a diseased sugarcane plant.

6.
Name the phenomenon that leads to situations like ‘XO’ abnormality in humans. Also name this genetic disorder. How are individuals with an XO chromosomal abnormality affected? Write its symptoms as well as karyotype.

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MCQ on Cell signaling: Introduction and Explanation

CBSE CLASS XII Related Questions

1.In vitro fertilization (IVF) is a popular method these days that is helping childless couples to bear a child. Write the different steps that are carried out in this technique. Would you consider gamete intra fallopian transfer as a type of IVF? Justify your answer.

2.Oogenesis is a discontinuous process that begins before birth and is completed after puberty. Trace the development of a gamete mother cell till its release from the ovary during ovulation. Name the two pituitary hormones that play an important role in the process.

3.Work out the crosses between: Normal female and Haemophilic male Carrier female and Normal male (III) Carrier female and Haemophilic male Write the conclusions you draw from these crosses. Comment on the type of inheritance of the disease. (Use: $X$ - Normal, $X^h$ - Haemophilic)

4.Suggest how a virus-free healthy plant can be obtained from a diseased sugarcane plant.

6.Name the phenomenon that leads to situations like ‘XO’ abnormality in humans. Also name this genetic disorder. How are individuals with an XO chromosomal abnormality affected? Write its symptoms as well as karyotype.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
In vitro fertilization (IVF) is a popular method these days that is helping childless couples to bear a child.
Write the different steps that are carried out in this technique.
Would you consider gamete intra fallopian transfer as a type of IVF? Justify your answer.

2.
Oogenesis is a discontinuous process that begins before birth and is completed after puberty.
Trace the development of a gamete mother cell till its release from the ovary during ovulation.
Name the two pituitary hormones that play an important role in the process.

3.
Work out the crosses between:
Normal female and Haemophilic male
Carrier female and Normal male
(III) Carrier female and Haemophilic male
Write the conclusions you draw from these crosses. Comment on the type of inheritance of the disease.
(Use: $X$ - Normal, $X^h$ - Haemophilic)

4.
Suggest how a virus-free healthy plant can be obtained from a diseased sugarcane plant.

6.
Name the phenomenon that leads to situations like ‘XO’ abnormality in humans. Also name this genetic disorder. How are individuals with an XO chromosomal abnormality affected? Write its symptoms as well as karyotype.