Mechanism of Action of Liphophilic Hormones

Q.

What is thromboplastin?

Q.

Lipid synthesis is performed by:

1. (a) Rough ER

2. (b) Smooth ER

3. (c) Both of above

4. (d) None of the above

Q.

Write any three differences between plant hormones and animal hormones.

Q.

Question 1
Which of the following is a plant hormone?

(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin

Q. Which of the following is true for lipophilic hormones?

1. Lipophilic hormones cross the plasma membrane
2. Inside the target cell, the steroid hormone binds to a specific receptor protein in the cytoplasm or nucleus.
3. Hormone-receptor complex enters the nucleus and binds to DNA, causing gene transcription.
4. Protein synthesis is induced.

Q. The given diagrams I and II represent the mechanism of action for two categories of hormones. Which of the following options correctly identifies the options A to H?

1. A - Protein hormone, B - Receptor, C - Second Messenger, D - Steroid hormone, E - Receptor-hormone complex, F - Nucleus, G - mRNA, H - Protein
2. A - Steroid hormone, B - Receptor, C - Second Messenger, D - Protein hormone, E - Receptor-hormone complex, F - Nucleus, G - mRNA, H - Protein
3. A - Protein hormone, B - Receptor-hormone complex, C - Second Messenger, D - Steroid hormone, E - Receptor, F - Nucleus, G - mRNA, H - Protein
4. A - Protein hormone, B - Receptor-hormone complex, C - mRNA, D - Steroid hormone, E - Receptor, F - Nucleus, G - Second messenger, H - Protein

Q. Steroid hormones easily pass through the plasma membrane by simple diffusion because they

1. Contain carbon and hydrogen
2. Enter through pores
3. Are lipid soluble
4. Are water soluble

Q. DIRECTIONS: The following questions have four choices (a), (b), (c) and (d) out of which only one is correct. You have to choose the correct alternative.

The correct sequence in the cell processing is:

1. RNA - DNA - Proteins
2. Proteins - DNA - RER
3. DNA - Golgi - Proteins
4. DNA - RER - Proteins

Q. Identify the organelle depicted and the part labelled 'A' in the given image.

1. Chloroplast, A-Thylakoid
2. Mitochondrion, A-Cristae
3. Golgi apparatus, A-Cristae
4. Golgi apparatus, A-Vesicle

Q.

Which of the following statement justifies that the lysosomes are formed out of Golgi apparatus?

1. The Golgi apparatus is involved in the packaging of proteins.

2. The Golgi apparatus produces the membrane of the lysosome.

3. The lysosome is usually attached to the Golgi apparatus

4. The lysosome has the same structure as Golgi apparatus.

Q. Differentiate between rough and smooth endoplasmic reticulum.

Q. Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside is (mostly in the nucleus)?

1. Somatostatin, oxytocin
2. Cortisol, testosterone
3. Insulin, glucagon
4. Thyroxin, insulin

Q.

SER detoxifies many poisons and drugs.

1. True
2. False

Q. The given diagrams I and II represent the mechanism of action for two categories of hormones. Which of the following options correctly identifies the options A to H?

1. A - Protein hormone, B - Receptor-hormone complex, C - mRNA, D - Steroid hormone, E - Receptor, F - Nucleus, G - Second messenger, H - Protein
2. A - Protein hormone, B - Receptor, C - Second Messenger, D - Steroid hormone, E - Receptor-hormone complex, F - Nucleus, G - mRNA, H - Protein
3. A - Steroid hormone, B - Receptor, C - Second Messenger, D - Protein hormone, E - Receptor-hormone complex, F - Nucleus, G - mRNA, H - Protein
4. A - Protein hormone, B - Receptor-hormone complex, C - Second Messenger, D - Steroid hormone, E - Receptor, F - Nucleus, G - mRNA, H - Protein