MCQs on General Biochemistry

The correct answers are highlighted in green.

# Detoxification of drugs is controlled by:
a) Cytochrome
b) Cytochrome P450
c) Cytochrome C
d) Cytochrome A

# In cytochrome P450, P stands for:

a) Structural proteins

b) Substrate protein

c) Pigment

d) Polymer

# Detoxification or protective synthesis occurs by:

a) Oxidation

b) Reduction

c) Conjugation

d) Any of the above

# The major driving force for formation of membrane lipid bilayer is:

a) Hydrogen bonding

b) Hydrophobic interactions

c) Vander waal forces

d) Not known

# Normal blood pH is :

a) 6.8-7.0

b) 7.0 - 7.12

c) 7.38 - 7.4

d) 7.7 - 8.0

# The most important buffer in RBC is:

a) O2 Hb +Na hemoglobinate

b) O2 Hb +K hemoglobinate

c) HCO3 +KHCO3

d) H2CO3 +NaHCO3

# In ECF main electrolyte is:

a) Na+

b) K+

c) Cl-

d) Proteins  

# Most important compensatory mechanism in metabolic acidosis:

a) Hyperventilation

b) Increased NH3 excretion by kidneys

c) Increased urinary phosphates

d) Increased HCO3 production

# Which of these organelle functions as the digestive system of the cell? (COMEDK-07)

a) Golgi apparatus

b) Mitochondria

c) Lysosomes

d) Rough endoplasmic reticulum

# Cell membrane consists of: (AIIMS-94)

a) Lipids and proteins

b) Lipids only 

c) Protein only

d) None of them

# Rate limiting step in adrenaline synthesis is conversion of:

a) Dopa to dopamine

b) Phenylalanine to tyrosine

c) Tyrosine to dopa

d) Dopamine to nor epinephrine

# A balanced diet consists of: (MAN-2K)

a) 20% proteins, 35% fats , 45% carbohydrates

b) 25% proteins, 25% fats , 50% carbohydrates

c) 20% proteins, 25% fats , 50% carbohydrates

d) 35% proteins , 15% fats , 50% carbohydrates

# Nor epinephrine is converted to epinephrine by:

a) O-methylation

b) Dopa decarboxylase

c) Dopamine hydroxylase

d) N-methylation

# Golgi bodies function as: (AIIMS-97)

a) Protein lipid synthesis

b) Protein synthesis

c) None of them

d) Sorting of glycoproteins

# Ubiquitin is involved in:

a) Electron transport chain

b) Protein folding

c) Intracellular proteolysis

d) Transport of ATP 

# Which of the following is inclusion of cytoplasm? (AIIMS-06)

a) Golgi Body

b) Glycogen

c) Endoplasmic reticulum

d) Ribosome

# Bile acids are formed from:

a) Lipoproteins

b) Amino acids

c) Bilirubin

d) Cholesterol

# Which of the following is a function of the Golgi apparatus? (COMEDK-07)

a) Protein storage

b) t RNA synthesis

c) m RNA synthesis

d) Modification of proteins

# The amino acid required for the synthesis of haem is: (COMEDK -2013)

a) Lysine

b) Glycine

c) Glutamic acid

d) Glutamine

# The most abundant protein present in body is: (AIPG-07)

a) Collagen

b) Hemoglobin

c) Albumin

d) Globulin

# The immediate precursor of norepinephrine is:

a) Phenylalanine

b) Epinephrine

c) Dopamine

d) Tyrosine

# Calcitonin is antagonist:

a) Thyroxine

b) Triiodothyronine

c) Parathyroid hormone

d) Serotonin

# Ribosomes are usually associated WITH: (TNPSC-99)

a) Endoplasmic reticulum

b) Mitochondria

c) Plasma membrane

d) Nucleolus

# During phagocytosis the metabolic process called respiratory burst involves activation of: (AIPG-10)

a) Hydrolase

b) Dehydrogenase

c) Peroxidase

d) Oxidase

# Which of the following has a ketogenic effect on liver?

a) GH

b) Glucagon

c) Androgen

d) Insulin

# The precursor of testosterone is:

a) Methyl testosterone

b) Aldosterone

c) Estrogen

d) Pregnenolone

 # Which of the organelles contain DNA? (PGI-02, AIPG-94)

a) Golgi apparatus

b) Nucleus

c) Nucleolus

d) Ribosomes

# During phagocytosis the metabolic process called respiratory burst involves activation of: (AIPG-10)

a) Hydrolase

b) Dehydrogenase

c) Peroxidase

d) Oxidase

# Bile contains:

a) Cholic acid

b) Chenodeoxycholic acid

c) Lithocholic acid & Deoxycholic acid

d) All of them

# Which one of the following is not a second messenger?

a) Phosphatidyl glycerol

b) cAMP

c) Phosphatidyl inositol

d) cGMP

# Normal blood bilirubin level is:

a) 3 - 4 mg%

b) 0.5 - 1 mg%

c) 1 - 3 mg%

d) 4 - 5.5 mg%

# Which cell organelle contains DNA? (AIPG-03)

a) Mitochondrion

b) Endoplasmic reticulum

c) Golgi body

d) Centriole

# Synthesis of protein occurs on:

a) Nucleus

b) Mitochondria

c) Golgi bodies

d) Poly ribosomes

# Which of the following is precursor of adrenaline and thyroxine synthesis?

a) None of options

b) Tyrosine

c) Tryptophan

d) Phenyl alanine

# Which one of the following human tissues contains the greatest amount of body glycogen? (COMEDK-05)

a) Liver

b) Cardiac muscle

c) Skeletal muscle

d) Kidney

# Bilirubin is produced from:

a) Gall bladder

b) Myoglobin

c) Haemoglobin & Myoglobin

d) Haemoglobin

# Which one of the following human tissues contains the greatest amount of body glycogen? (COMEDK-05)

a) Liver

b) Cardiac muscle

c) Skeletal muscle

d) Kidney

# Oligosaccharide is : (AP-06)

a) Maltose

b) Dextrin

c) Fructose

d) Glucose