Amino Acids,Peptides and Proteins MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Amino Acids,Peptides and Proteins, a fundamental topic in the field of Biochemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Amino Acids,Peptides and Proteins MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Amino Acids,Peptides and Proteins mcq questions that explore various aspects of Amino Acids,Peptides and Proteins problems. Each MCQ is crafted to challenge your understanding of Amino Acids,Peptides and Proteins principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Amino Acids,Peptides and Proteins MCQs are your pathway to success in mastering this essential Biochemistry topic.

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Amino Acids,Peptides and Proteins MCQs | Page 12 of 31

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Q111.
The four subunits of the hemoglobin (Hb) gene represent protein's

a.

primary structure

b.

secondary structure

c.

tertiary structure

d.

quaternary structure

Discuss
Answer: (d).quaternary structure
Q112.
Beta pleated sheets are examples of protein's

a.

primary structure

b.

secondary structure

c.

tertiary structure

d.

quaternary structure

Discuss
Answer: (b).secondary structure
Q113.
BRACl, an inherited form of breast cancer, regulates cell division by

a.

binding to a DNA sequence

b.

complexing with cyclins

c.

binding to the cell outer membrane

d.

binding to the protein RAD 51 which repairs DNA damage

Discuss
Answer: (d).binding to the protein RAD 51 which repairs DNA damage
Q114.
Metastasis involves

a.

ability of cells to dissolve cellular matrix

b.

metalloprotein levels

c.

decreased levels of proteins that regulate metalloproteins

d.

all of the above

Discuss
Answer: (d).all of the above
Q115.
Signal sequences are part of a protein that

a.

signal folding of the protein

b.

signal the protein synthesis on the ribosomes is ended

c.

transport proteins to other sites within the cell

d.

refold proteins in prion-associated diseases

Discuss
Answer: (c).transport proteins to other sites within the cell
Q116.
Individuals with PKU disease are mentally retarded unless

a.

phenylalanine in the diet is restricted

b.

tyrosine in the diet is restricted

c.

homogentisic acid in the diet is restricted

d.

none of the above

Discuss
Answer: (a).phenylalanine in the diet is restricted
Q117.
Marfan's syndrome is thought to be a mutation affecting

a.

hemoglobin synthesis

b.

collagen synthesis

c.

metabolism of homogentisic acid

d.

insufficient thyroid production

Discuss
Answer: (b).collagen synthesis
Q118.
Cyclins are proteins that

a.

regulate ability of cells to invade tissue

b.

regulate passage from one stage of cell division to another

c.

regulate apoptosis of damaged cells

d.

none of the above

Discuss
Answer: (b).regulate passage from one stage of cell division to another
Q119.
Over 50% of common cancers are associated with damage to a protein, p53. This protein

a.

is a cyclin

b.

is a tumor supressor

c.

is an oncogene

d.

regulates apoptosis

Discuss
Answer: (b).is a tumor supressor
Q120.
Protein folding is

a.

automatic, mediated by the protein itself

b.

mediated by other proteins called chaperones

c.

mediated by the ribosomes

d.

none of the above

Discuss
Answer: (b).mediated by other proteins called chaperones
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