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fenix001 [56]
3 years ago
7

adenine,guanine,cytosyne and thymine are the four nitrogenous bases present in the DNA of all organisms.Which scientist discored

these bases?
Biology
1 answer:
laila [671]3 years ago
5 0
The scientist who is said to have discovered all the four nitrogenous bases present in the DNA of all organisms is, Erwin Chargaff, an Austro-Hungarian biochemist who immigrated to the United States. Hope this helps!
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Restriction endonucleases are especially useful if they generate sticky ends. What makes an end sticky?
Mazyrski [523]

The question is incomplete as it does not have the options which are:

A) single-stranded complementary tails

B) blunt ends

C) poly-A sequences

D) 5' cap

E) interference

Answer:

A) single stranded complementary tails

Explanation:

Restriction endonuclease is the enzyme which cuts the DNA sequence in the internal sequence.

The endonuclease enzyme can cut the DNA sequence in a way that it can form the cuts with the single-stranded overhangs called sticky ends and without overhangs called blunt ends.

The sticky ends are produced when the enzyme makes cut at the single strand and then makes the cut at between the same base at the nitrogenous base. This type of asymmetrical cut forms the single-stranded overhangs which can form the complementary base pairs easily.

Thus, Option-A is correct.

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3 years ago
What happens to sister chromatids in meosis 2?
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3 years ago
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In cats having hair is dominant (H) over not having hair (h). If a male cat that is heterozygous for hair is crossed with a hair
alexgriva [62]
A heterozygous cat has a genotype Hh
A hairless cat has a genotype hh
When crossed, the results could be any of the following:
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What do the parasympathetic and sympathetic divisions have in common? hints what do the parasympathetic and sympathetic division
egoroff_w [7]

Answer:

Most nerve fibers from both divisions innervate many of the same effectors.

Most nerve fibers from both divisions share the same sites of origin.

The parasympathetic nervous system is responsible for controlling the homeostasis, resting and digestion functions of the body. The sympathetic nervous system controls the body's response against threat and fight and flight responses. Both parasympathetic and sympathetic nervous systems are responsible for the involuntary functions of the human body.

Most nerve fibers from both divisions share the same sites of origin because both have the nerve fibers that are originated from brain or spinal cord that are directed or passes to the targeted organs.

Most nerve fibers from both divisions innervate many of the same effectors so as to induce functions according to the bodily needs.

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3 years ago
Why are most bacteria unable to live in our bodies?
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