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Biochemistry

Description: Online study of the chemical processes in living organisms deals with the structures and functions of cellular components such as proteins, carbohydrates, lipids, nucleic acids and other biomolecules
Number of Questions: 25
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Tags: Biochemistry Biology Carbohydrates Lipids Proteins Nucleic acids Enzymes Micromolecules of Life Metabolites in Humans Nucleic Acids Gene Expression and Regulation Regulation of Gene Expression Biology and Human Welfare
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A/An ______ binds to a site different from the substrate binding site in an enzyme.

  1. uncompetitive inhibitor

  2. non competitive inhibitor

  3. competitive inhibitor

  4. suicide inhibitor


Correct Option: B
Explanation:

Non competitive inhibitor

The functional part of a gene is called

  1. exon

  2. cistron

  3. axon

  4. recon


Correct Option: B
Explanation:

Cistron

Penicillin was discovered by

  1. Alexander Fleming

  2. Erlenmeyer

  3. H.Khorana

  4. Beadle and Tatum


Correct Option: A
Explanation:

Alexander Fleming

A hollow spherical structure formed due to folding of a lipid bilayer on itself is a

  1. lipid bilayer

  2. Liposome

  3. Lysosome

  4. Miscelles


Correct Option: D
Explanation:

Miscelles

Non hexose precursers are converted into glucose in the process of

  1. Glycolysis

  2. Gluconeogenesis

  3. PP pathway

  4. Citric acid cycle


Correct Option: B
Explanation:

Gluconeogenesis

________ disease is characterized by the inability of the intestinal enzymes to digest certain water-insoluble proteins of wheat

  1. Beri-Beri

  2. Pancreatis

  3. Celiac disease

  4. Phenylketonuria


Correct Option: C
Explanation:

Celiac disease

The major human serum immunoglobulin is

  1. IgM

  2. IgA

  3. IgD

  4. IgG


Correct Option: D
Explanation:

IgG

Alpha and beta glucose are

  1. anomers

  2. epimers

  3. isomers

  4. oligomers


Correct Option: A
Explanation:

Anomers

____________ is bound to enzyme protein by a covalent bond

  1. Holoenzyme

  2. Cofactor

  3. Prosthetic group

  4. Apoenzyme


Correct Option: C
Explanation:

Prosthetic group

The carbon -fixation in photosynthesis occurs during the

  1. light reaction

  2. dark reaction

  3. photorespiration

  4. photophosphorylation


Correct Option: B
Explanation:

dark reaction

Which of the following is not a reducing sugar?

  1. Glucose

  2. Sucrose

  3. Galactose

  4. Mannose


Correct Option: B
Explanation:

Sucrose

The backbones of DNA and RNA are

  1. amphipathic

  2. hydrophilic

  3. hydrophobic

  4. non-polar


Correct Option: B
Explanation:

hydrophilic

In a nucleotide molecule the phosphate group is esterified at the _______ carbon atom of pentose sugar.

  1. 5

  2. 5-prime

  3. 1

  4. 1-prime


Correct Option: B
Explanation:

5-prime

Which nitrogenous base is present in RNA?

  1. Cytidine

  2. Thymine

  3. Uracil

  4. Methionine


Correct Option: C
Explanation:

Uracil

Interconversion of the alpha and beta forms of glucose in an aqueous solution is called

  1. Anomerisation

  2. Mutarotation

  3. Aldolation

  4. Glycosidation


Correct Option: B
Explanation:

Mutarotation

Degradation of glucose or other organic nutrients into different products under anaerobic conditions, to obtain ATP is called

  1. Fermentation

  2. Glycolysis

  3. PPpathway

  4. C-4 cycle


Correct Option: A
Explanation:

Fermentation

_________ is characterized by absorbtion at wavelengths of 260 nm.

  1. Amino acids

  2. Nucleic acids

  3. Phosphoric acids

  4. Cholesterols


Correct Option: B
Explanation:

Nucleic acids

The non reducing sugar is

  1. sucrose

  2. lactose

  3. mannose

  4. maltose


Correct Option: A
Explanation:

Sucrose

A typical eukaryotic cell contains about

  1. 40,000genes

  2. 30,000genes

  3. 50,000 genes

  4. 70,000genes


Correct Option: B
Explanation:

30,000genes

The Z-form and the B-form of DNA differ in the former being a

  1. right handed helix

  2. straight

  3. unpaired

  4. left handed helix


Correct Option: D
Explanation:

Left handed helix

Amplification of specific DNA sequences by in vitro DNA synthesis is

  1. Polymerase chain reaction

  2. Transcription

  3. Amplification

  4. Translation


Correct Option: A
Explanation:

Polymerase chain reaction

Movement of solute from the region of higher concentration to the lower one, across a barrier is

  1. facilitated diffusion

  2. active transport

  3. simple diffusion

  4. passive transport


Correct Option: C
Explanation:

Simple diffusion

The Watson -Crick DNA structure is also referred to as

  1. A-form

  2. Z-form

  3. B-form

  4. H-form


Correct Option: C
Explanation:

B-form

Antibodies produced by a single clone and directed against a single antigenic determinant are called

  1. Monoclonal antibodies

  2. IgG

  3. HPRT

  4. macrophages


Correct Option: A
Explanation:

Monoclonal antibodies

Which of the following cannot be used in DNA cloning?

  1. Plasmids

  2. Cosmids

  3. Bacteriophages

  4. Amoeba


Correct Option: D
Explanation:

Amoeba

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