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Biochemistry

Description: BIOCHEMISTRY 3 multiple choice
Number of Questions: 15
Created by:
Tags: biochemistry CELL ANIMAL Organization of Life
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The ‘anti-beriberi factor’ is called so because of the fact that the problem of beriberi increases greatly when the concerned diet lacks this factor.

Which of the following vitamins is popularly known as anti-beriberi factor?

  1. Vitamin B1

  2. Vitamin B3

  3. Vitamin B6

  4. Vitamin B12

  5. Vitamin C


Correct Option: A
Explanation:

Vitamin B1 or thiamine is popularly called anti-beriberi factor as well as anti-neuritic factor. Dry beriberi is characterized by rapid weight loss and muscle wasting while wet beriberi type is characterized additionally by generalized edema.

Column chromatography is the method used in purification of individual chemical compounds from a mixture of compounds where the stationary phase is placed in a vertical glass column.

Which of the following represents the trademark for adsorbent used in the column chromatography of lipids?

  1. Cetavlon

  2. Dowex

  3. Florisil

  4. Duponol

  5. Clinistix


Correct Option: C
Explanation:

Florisil refers to the trademark for a magnesium silicate adsorbent used in the column chromatography of lipids.

Adipose tissue is a type of fat filled tissue mainly associated with protection and cushioning of vital organs of our body.

Which of the following cellular structures is found in adipose tissue?

  1. Acanthosome

  2. Aurosome

  3. Carboxysome

  4. Catalysome

  5. Cercidosome


Correct Option: D
Explanation:

Catalysome refers to an organelle, found in adipose tissue, that functions in lipid metabolism; may represent a specialized type of mitochondrion.

Free fatty acids are unesterified form of fatty acids found in the blood plasma.

The number of milligrams of potassium hydroxide required to neutralize the free fatty acids in 1 g of fat is called ___________.

  1. iodine number

  2. acid number

  3. acetyl number

  4. coordination number

  5. hehner number


Correct Option: B
Explanation:

Acid number or acid value refers to the number of milligrams of potassium hydroxide required to neutralize the free fatty acids in 1 g of fat.

There are 5 types of immunoglobulin molecules carrying out diverse functions in the immune system.

Which of the following classes of immunoglobulins is the most abundant form of circulating antibody?

  1. IgM

  2. IgG

  3. IgA

  4. IgD

  5. IgE


Correct Option: B
Explanation:

IgG is the most abundant form of circulating antibody.

The genetic code specifies the RNA triplets that correspond to each amino acid residue.

Which of the following codons is called amber codon?

  1. UAG

  2. UAA

  3. UGA

  4. AUG

  5. AAA


Correct Option: A
Explanation:

The codon UAG, one of the three termination codons, is called amber codon.

Vitamin B12 is a water-soluble vitamin forming the part of the vitamin B complex.

Which of the following chemical tests help us to measure the rate of absorption of vitamin B12 from our intestine?

  1. Acrolein test

  2. Anthrone test

  3. Carr-Price test

  4. Schilling test

  5. Sulkowitch test


Correct Option: D
Explanation:

Schilling test refers to a test performed by administering vitamin B12, labelled with radioactive cobalt to an individual that helps to measure the rate of absorption of vitamin B12 from intestine.

Haemoglobin is the oxygen carrier protein found in our red blood cells.

Which of the following chemical reagents is utilized in testing for haemoglobin?

  1. Nessler's reagent

  2. Benedict's reagent

  3. Stokes' reagent

  4. Nylander's reagent

  5. Pauly's reagent


Correct Option: C
Explanation:

  Stokes' reagent : Stokes' reagent refers to a solution of ferrous sulphate, tartaric acid and ammonia that is used in testing for hemoglobin.

There are various chemical tests performed as a part of urine analysis.

Which of the following chemical tests help us to determine the presence of albumin in urine?

  1. Berthelot test

  2. Bradshaw test

  3. Ictotest

  4. Ketostix test

  5. Tanret's test


Correct Option: E
Explanation:

Tanret's test refers to chemical test that helps to determine the presence of albumin in urine; the reagent containing potassium iodide, mercuric chloride and acetic acid forms a white precipitate with albumin.

Fatty acid refers to the major constituent of lipid, glycerol being another constituent.

Which of the following fatty acids is a 24 carbon based fatty acid?

  1. Chaulmoogric acid

  2. Eleostearic acid

  3. Stearic acid

  4. Vaccenic acid

  5. Nervonic acid


Correct Option: E
Explanation:

Nervonic acid is an unsaturated fatty acid having 24 carbon atoms and 1 double bond; it is a constituent of cerebrosides.

Temperature is one of the important abiotic factor influencing plant growth.

Which of the following instruments is used as temperature transducer in plants?

  1. Porometer

  2. Bolometer

  3. Potometer.

  4. Auxanometer

  5. Tensiometer


Correct Option: B
Explanation:

Bolometer is a temperature transducer used for the measurement of minute quantities of radiant heat.

Any outgrowth of a tissue is called a tumor. Tumor may be benign or malignant in nature.

Which of the following represents a cancer-like tumor of the digestive tract that grows slowly and rarely metastasizes?

  1. Ascites

  2. Aneurysm

  3. Atheroma

  4. Blastoma

  5. Carcinoid


Correct Option: E
Explanation:

Carcinoid refers to a cancer-like tumor of the digestive tract that grows slowly and rarely metastasizes.

Frame shift mutation refers to the type of gene mutations created by a deletion or insertion in a DNA sequence, which shifts the reading frame sequence.

Which of the following mutagenic agents intercalate in the DNA causing frameshift mutation?

  1. Nitrous acid

  2. Benzo[a]pyrene

  3. Dimethylnitrosamine

  4. Aflatoxin

  5. Ultraviolet light


Correct Option: B
Explanation:

Benzo[a]pyrene, found in smoke is a mutagenic agent that intercalates in the DNA causing frameshift mutation.

Red muscle is the type of striated muscle required for relatively continuous utility.

Which of the following characteristics is found in red striated muscle?

  1. Large fiber size

  2. Fast twitch

  3. Many mitochondria

  4. Little myoglobin

  5. Glycolysis as main source of ATP


Correct Option: C
Explanation:

Red muscles are characterized by many mitochondria, hence depend greatly on aerobic metabolism in mitochondria.

Polyethylene glycol (PEG), made of repeating ethylene glycol units renders greater water solubility to proteins.

Which of the following represents the trademark for polyethylene glycol?

  1. Carborundum

  2. Carbowax

  3. Celite

  4. Cellophane

  5. Cellosolve


Correct Option: B
Explanation:

Carbowax refers to the trademark for polyethylene glycol.

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