Biochemistry
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
Questions
A/An ______ binds to a site different from the substrate binding site in an enzyme.
- uncompetitive inhibitor
- non competitive inhibitor
- competitive inhibitor
- suicide inhibitor
The functional part of a gene is called
- exon
- cistron
- axon
- recon
Penicillin was discovered by
- Alexander Fleming
- Erlenmeyer
- H.Khorana
- Beadle and Tatum
A hollow spherical structure formed due to folding of a lipid bilayer on itself is a
- lipid bilayer
- Liposome
- Lysosome
- Miscelles
Non hexose precursers are converted into glucose in the process of
- Glycolysis
- Gluconeogenesis
- PP pathway
- Citric acid cycle
________ disease is characterized by the inability of the intestinal enzymes to digest certain water-insoluble proteins of wheat
- Beri-Beri
- Pancreatis
- Celiac disease
- Phenylketonuria
The major human serum immunoglobulin is
- IgM
- IgA
- IgD
- IgG
Alpha and beta glucose are
- anomers
- epimers
- isomers
- oligomers
____________ is bound to enzyme protein by a covalent bond
- Holoenzyme
- Cofactor
- Prosthetic group
- Apoenzyme
The carbon -fixation in photosynthesis occurs during the
- light reaction
- dark reaction
- photorespiration
- photophosphorylation
Which of the following is not a reducing sugar?
- Glucose
- Sucrose
- Galactose
- Mannose
The backbones of DNA and RNA are
- amphipathic
- hydrophilic
- hydrophobic
- non-polar
In a nucleotide molecule the phosphate group is esterified at the _______ carbon atom of pentose sugar.
- 5
- 5-prime
- 1
- 1-prime
Which nitrogenous base is present in RNA?
- Cytidine
- Thymine
- Uracil
- Methionine
Interconversion of the alpha and beta forms of glucose in an aqueous solution is called
- Anomerisation
- Mutarotation
- Aldolation
- Glycosidation
Degradation of glucose or other organic nutrients into different products under anaerobic conditions, to obtain ATP is called
- Fermentation
- Glycolysis
- PPpathway
- C-4 cycle
_________ is characterized by absorbtion at wavelengths of 260 nm.
- Amino acids
- Nucleic acids
- Phosphoric acids
- Cholesterols
The non reducing sugar is
- sucrose
- lactose
- mannose
- maltose
A typical eukaryotic cell contains about
- 40,000genes
- 30,000genes
- 50,000 genes
- 70,000genes
The Z-form and the B-form of DNA differ in the former being a
- right handed helix
- straight
- unpaired
- left handed helix
Amplification of specific DNA sequences by in vitro DNA synthesis is
- Polymerase chain reaction
- Transcription
- Amplification
- Translation
Movement of solute from the region of higher concentration to the lower one, across a barrier is
- facilitated diffusion
- active transport
- simple diffusion
- passive transport
The Watson -Crick DNA structure is also referred to as
- A-form
- Z-form
- B-form
- H-form
Antibodies produced by a single clone and directed against a single antigenic determinant are called
- Monoclonal antibodies
- IgG
- HPRT
- macrophages
Which of the following cannot be used in DNA cloning?
- Plasmids
- Cosmids
- Bacteriophages
- Amoeba