General physiology Qs
1. What is
the soil concentration of Naked Extracellular [eDNA] in the environment?
A) 2 µg/g
B) 28µg/g
C) 50µg/g
D) 88µg/g
Ans: A
2. What is
the concentration of Naked Extracellular [eDNA] in the aquatic environment?
A)20µg/g
B) 30µg/g
C) 58µg/g
D) 88µg/g
Ans: D
3. e-DNA
may be involved in
A)
Vertical gene transfer
B)
Horizontal Gene transfer
C) Junk
DNA process
D)
Maintaining stability of its structure
Ans: B
Explanation:
Naked extracellular [e-DNA] is released by cell death and constantly existing
in the environment. The concentration in the soil is 2µg/g and in Aquatic
environment is 88µg/g.
The
possible functions are:
a. May be
involved in Horizontal gene transfer.
b.provide
nutrition
c.act as a
Buffer to recruit or titrate ions or antibiotics
d.act as an
extracellular matrix component in the bio films.
[bio films-group
of microbes in which cells adhere to each other.
4. The
common form of DNA is said to be
A) Left
handed
B) Right
handed
C) Anti-clock
wise direction
D)
Parallel
Ans: B
Explanation:
The 2 strands of each DNA molecules are anti-parallel, i.e. they run in
opposite directions to each other. One chain runs in 5’ [5 prime] to 3’ [3prime]
and the other in 3’ to 5’.The common form of DNA is said to be Right handed,
because the base residue forms a spiral in clock-wise direction.
5. How
many pairs of nucleotides are present in one full turn of helix in Watson&Crick
–B-DNA?
A) 10
B) 20
C) 30
D) 40
Ans: A
6 .Z-DNA
is-
A) Right
handed
B) Left
handed
C)
Clock-wise
D) Common
form
Ans: B
7. Which
of the following statements regarding RNA is wrong?
A) Single
strand
B)
Contains Ribose sugar
C) Obeys
Chargaff’s rule
D)
Pyrimidine is uracil
Ans: C
8. JUNK-DNA
is called
A)
Essential DNA
B) e-DNA
C)Codons
D) Non-coding
DNA
Ans: D
9. Each
molecule of Calmodulin [CaM] binds
A) 6
calcium ions
B) 5
calcium ions
C) 4
calcium ions
D) 3
calcium ions
Ans: C
10. Which
of the following substances is called ‘Docking protein’ /
A) Signal
recognition particle [SRP-Receptor]
B) Signal
peptidase
C) Nascent
protein
D)
Calmodulin
Ans: A
