Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
GUU, GCU - Alanine
UAG, UGA - stop
AUG, ACG - start/ methionine
AUG, ACG - start/ methionine
B.
UAG, UGA - stop
The group of nucleotides that specifies one amino acid is a code word or condo. The nucleotides of mRNA are arranged as a linear sequence of codons, each London consisting of three successive nitrogenous bases. Three codons UAG, UAA and UGA are the chain stop or termination codons. They do not code for any of the amino acids.
In most organisms AUG codon is the start or initiation codon, They do not code or any of the amino acids.
In most organisms AUG codon is the start or initiation codon, ie, the polypeptide chain starts either with methionine or N-formylmethionine.
Leucine - UUA, UUG, CUU, CUC, CUA, CUG
Alanine - GUC, GCC, GCA, GCG
GUU - Valine
UCA - Serine
Given below is a diagrammatic cross section of a single loop of the human cochlea.
diagram
Which one of the following options correctly represents the names of three parts?
C :Endolymph
D : Sensory hair cells
A: Serum
D: Sensory hair cells
A: Endolymph
B: Tectorial membrane
D: Sensory hair cells
A: Endolymph
B: Tectorial membrane
Lysozyme that is present in perspiration, saliva and tears, destroys
certain fungi
certain types of bacteria
all viruses
all viruses
Restriction endonuclease
cuts the DNA molecule randomly
cuts the DNA molecule at specific sites
restricts the synthesis of DNA inside the nucleus
restricts the synthesis of DNA inside the nucleus
What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?
The larger the fragment size, the farther it moves
The smaller the fragment size, the farther it moves
Positively charged fragments move to farther end
Positively charged fragments move to farther end
During DNA replication, Okazaki fragments are used to elongate
The leading strand towards replication fork
The lagging strand towards replication fork
The leading strand away from replication fork
The leading strand away from replication fork
A gene whose expression helps to identify transformed cell is known as
Selectable marker
Vector
Plasmid
Plasmid
The DNA fragments separated on an agarose gel can be visualised after staining with
Bromophenol blue
Acetocarmine
Aniline blue
Aniline blue
Which of these statements is incorrect?
Enzymes of TCA cycle are present in mitochondrial matrix
Glycolysis occurs in cytosol
Oxidative phosphorylation takes place in outer mitochondrial membrane
Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
Bio-infringement
Biopiracy
Bioexploitation
Biodegradation
