answer these please......... - nitya

[ArchivalUser]

1.at which stage in the process of gene clonong are restriction nucleases used?
a.expression of cloned gene by the bacteria
b.introduction of recombinant DNA into a bacterial cell
c.insertion of cDNA into the vector DNA

2.which of the following statements best describe primary role of calcium in activation of cardiac muscle?

a.couple myosin and actin to form actinomyosin
b.reduce inhibition of tropomyosin up the myofilaments

3.which of the following vessles contain highest...viscosity blood in the body?
a.aorta
b.vena cava
c.vasa recta
pulmonary vein

nitya

[ArchivalUser]

1..b?
2.a?
3.c?

[ArchivalUser]

1.c 2.a? 3c

[ArchivalUser]

1-c
2-?
3-a

[ArchivalUser]

1-c 2-a 3-b or c

[ArchivalUser]

1.B
2. A
3.B
In the blood supply of the kidney, the vasa recta form a series of straight capillaries that descend from the cortex into the medulla.Each of the vasa recta has a hairpin turn in the medulla and carries blood at a very slow rate.
The slow blood flow in vasa recta makes them a likely place of thrombosis in hypercoagulable states, or erythrocyte sickling in sickle cell disease.

[ArchivalUser]

SORRY my ans r
1.B
2.A
3.C

[ArchivalUser]

1.b
2.a
3.c

[ArchivalUser]

c

a

i am very sure of these two.

third one may be c or b