- Assertion : A peptide bond (–CO – NH_) is established
between the amino group (–NH 2 ) of amino acid at P site,
and carboxyl group (–COOH) of amino acid at A-site.
Reason : Peptide bond formation during translation is
catalysed by a protein enzyme peptidyl transferase.
Figure Based Questions- Refer to the given figure and answer the following
questions.
(a) Identify the parts P, Q, R, S and T in the given figure.
(b) State the function of Q and R in the molecule.
(c) What is the above molecule called? Name the site for
recognition and attachment of mRNA codon.- Read the given figure and answer the following questions.
o z y a
mRNAA
BXYZTranscriptionip(a) Identify A, B, X, Y and Z in the given figure.
(b) Briefly describe the function of A.
(c) Which labelled part is involved in hydrolysing the
lactose?CHAPTER-7 : EVOLUTION
Multiple Choice Questions- The Hardy-Weinberg principle cannot operate if
(a) gene flow does not occurs between population
(b) frequent mutations occur in the population
(c) the population has no chance of interaction with
other populations
(d) free interbreeding occurs among all members of the
population.- The extinct human ancestor, whose fossil was discovered
by Edward Lewis from Pliocene rocks of Shivalik Hills of
India was
(a) Ramapithecus (b) Australopithecus
(c) Dryopithecus (d) Homo erectus. - Which of the following options gives one correct example
each of convergent evolution and divergent evolution?
Convergent Divergent
evolution evolution
(a) Thorns of Bougainvillea Wings of butterfly and
and tendrils of Cucurbita birds
(b) Eyes of octopus and Bones of forelimbs of
mammals vertebrates
(c) Bones of forelimbs of Wings of butterfly and
vertebrates birds
(d) Thorns of Bougainvillea^ Eyes of octopus and
and tendrils of Cucurbita mammals - An isolated population of humans with approximately
equal numbers of blue-eyed and brown-eyed individuals
was decimated by an earthquake. Only a few brown-eyed