- Which of the following statements are correct with
respect to lipoproteins?
(a) Molecular mass of lipoproteins is directly proportional to
their density.
(b)The per cent protein content in lipoprotein increases with
molecular mass.
(c) Density of a lipoprotein decreases with increase in protein
content.
(d)Molecular mass of lipoproteins is inversely proportional to
their density.
- The function of calmodulin is to
(a) begin an enzyme cascade by phosphorylating multiple
proteins
(b)bind with Ca^2 + and regulate the activity of cellular proteins
(c) lower blood calcium levels
(d)serve as a second messenger in a signal transduction
pathways
- A virus has genome comprising of DNA molecule
with a base composition of A= 24. 6 %, T= 34. 7 %,
G= 20. 2 % and C= 20. 2 %. How would you describe
the DNA and determine whether the molecule is
linear or circular?
(a) the DNA is single stranded and if resistant to double
stranded specific nucleases, it is linear.
(b)the DNA is partially double stranded and if resistant to
nucleases, it is linear.
(c) the DNA is single stranded and if resistant to double
stranded and single strand specific exonucleases, it is
circular.
(d)None of the above
- Consider the following statements.
I.Pisces and Amphibia can be distinguished
from each other on the basis of fundamental
differences in the lateral line system.
II.Elasmobranchi and Teleostomi can be
distinguished from each other on the basis of
endoskeleton.
III.Scoliodon and Torpedo are distinguished on
the basis of electric organ through both belong
the class–Pisces.
IV.Salamandra is distinguishable from Bufo on
the basis of parotid gland.
Choose the correct set of statements from given codes.
(a) I, II and IV (b) I and IV
(c) II and III (d) l, II, III and IV
- A few members of a population have reached a
favourable habitat with few predatons and
unlimited resources, but their population growth
rate is slower than that of parent population. What
can be possible explanation for this situation?
(a) The genetic makeup of these founders may be less
favorable than that of the parent population.
(b)The parent population may still be in an exponential part of
its growth curve and not yet limited by density dependent
factors.
(c) The Allee effect may be operating and there may be not
enough population members present for successful
reproduction.
(d)All of the above
- Galactosemia is recessive single gene genetic
disorder, caused due to the mutation in any one of
the three genes involved in galactose catabolism.
A family consists of 10 normal children with both
parents suffering from galactosemia. It is most
likely due to
(a) reversion (b) epistasis
(c) complementation (d) suppression
- Positional cloning refers to
(a) using a selection procedure to clone c-DNA.
(b)isolating a gene by PCR using primers from another
species.
(c) isolating a gene from a specific tissue in which it is being
expressed.
(d)mapping a gene to a chromosomal region and then
identifying and cloning a genomic copy of the gene from
region.
