The first type II restriction endonuclease discovered that could cut dsDNA specific site was:
1. EcoRI
2. SmaI
3. Hind II
4. Hind III
For the stability of the organic compounds, Oparin opined that probably:
1. UV radiation never reached the surface of the primeval Earth
2. the primeval Earth was in a molten state
3. the primeval Earth atmosphere was reducing rather than oxidizing
4. plenty of energy sources were available for chemical reactions to occur
Identify the incorrect statement:
(1) In addition to recombination, mutation is another phenomeonon that leads to variation in DNA.
(2) Chromosomal aberrations are commonly observed in cancer cells.
(3) A classical example of a point mutation is sickle cell anaemia.
(4) Non ionising radiations cannot be mutations.
Pedigree analysis is resorted to for genetic analysis in humans rather than conventional genetic methods because:
I. Choice matings are not possible
II. Number of progeny is limited
Of the two statements:
(1) Only I is correct
(2) Only II is correct
(3) Both I and II are correct
(4) Both I and II are incorrect
Lanthanoid which is radioactive is:
1. Promethium
2. Europium
3. Plutonium
4. Neptunium
Which of the following has a negative slope?
1. C CO
2. Fe Fe2O3
3. Mg MgO
4. All of the above
Which is not hydrolysed with water?
(1) PCl3
(2) NF3
(3) NCl3
(4) BCl3
A coil of resistance 20 and inductance 5H has been connected to a 200 V battery. The maximum energy stored in the coil is
(1) 250 J
(2) 125 J
(3) 500 J
(4) 100 J
An
1. \(\dfrac{i_1+i_2}{\sqrt{2}}\)
2. \(\dfrac{(i_1+i_2)^2}{\sqrt{2}}\)
3. \(\sqrt{\dfrac{i_1^2+i^2_2}{2}}\)
4. \(\dfrac{\sqrt{i_1^2+i^2_2}}{2}\)