Lipid Rafts and Caveolae Practice Questions

Question 1

What is the main component of a bilayer cell membrane?

Accepted Answer

Phospholipids

Answer

Cholesterol ester

Answer

Triacyl glycerol

Answer

Cholesterol

Question 2

Which of the following statements best describes the mechanism of action of insulin on target cells?

Accepted Answer

Insulin binds to a transmembrane receptor on the outer surface of the plasma membrane, activating the tyrosine kinase in the cytosolic domain of the receptor.

Answer

Insulin binds to a receptor on the outer surface of the plasma membrane, activating adenylate cyclase through the Gs protein.

Answer

Insulin binds to a cytoplasmic receptor and is transferred as a hormone receptor complex to the nucleus to modulate gene expression.

Answer

Insulin enters the cell and causes the release of calcium ions from intracellular stores.

Question 3

Name the structure marked with an arrow

Accepted Answer

Secretory vesicles

Answer

Mitochondria

Answer

Rough Endoplasmic reticulum

Answer

Golgi bodies

Question 4

What is the classification of intelligence corresponding to an IQ score of 90-109?

Accepted Answer

Average

Answer

Below average

Answer

Slightly below average

Answer

Above average

Question 5

Calcified canal is explored with all of the given instruments except:

Accepted Answer

10 K file

Answer

6 K file

Answer

C+ file

Answer

Profinder

Question 6

Which of the following statements about chaperones is false?

Accepted Answer

Are lipid in nature

Answer

Cause folding of proteins

Answer

Include heat shock proteins

Answer

May have ATPase activity

Question 7

Statement 1 - A 59-year-old patient presents with flaccid bullae. Histopathology shows a suprabasal acantholytic split.
Statement 2 - The row of tombstones appearance is diagnostic of Pemphigus vulgaris.

Accepted Answer

Statements 1 & 2 are correct, 2 is not explaining 1

Answer

Statements 1 and 2 are correct and 2 is the correct explanation for 1

Answer

Statements 1 and 2 are incorrect

Answer

Statement 1 is incorrect

Question 8

Protein segregation occurs in which organelle?

Accepted Answer

Golgi apparatus

Answer

Peroxisomes

Answer

ER

Answer

Mitochondria

Question 9

Blood group antigens are chemically:

Accepted Answer

Glycoprotein

Answer

Carbohydrate

Answer

Phospholipids

Answer

Polysaccharide

Question 10

Which of the following is the most important interaction in the formation of the cell membrane lipid bilayer and in lipid-protein interaction?

Accepted Answer

Hydrophobic interactions

Answer

Both hydrophobic and covalent interactions

Answer

Covalent bonds

Answer

Hydrogen bonds

Lipid Rafts and Caveolae — MCQs

Lipid Rafts and Caveolae — MCQs

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