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serious [3.7K]
3 years ago
14

What are restriction enzymes and how are they used to cut DNA?

Biology
1 answer:
Colt1911 [192]3 years ago
4 0

Answer and Explanation:

A restriction enzyme is a type of endonuclease enzyme  that recognizes  a specific short nucleotide sequences on the DNA and  cuts the DNA only at palindromic sites. There are different types of restriction enzymes:

1. Type I restriction enzyme – It cuts at sites far  from the recognition site and requires both ATP and S-adenosyl-  L-methionine as cofactor to function.  

2. Type II restriction enzymes – It cleaves at short-specific distances from the recognition  site and mostly  requires magnesium to function.

3. Type III restriction enzymes – It recognizes two  separate non-palindromic sites and cleaves at 20–30 base  pairs away from a recognition site. It requires both ATP  and S-adenosyl-L-methionine  .

The restriction enzymes cleave DNA sequences producing either sticky or blunt ends that can be ligated with other sequences.

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When a sudden change in the environment, such as a flood or fire, reduces the size of a population, the survivors' collective ge
maksim [4K]

Answer: option A - bottleneck effect

Explanation:

Whenever sudden change caused by human or natural disasters occurs in the environment leading to the reduction of organisms or biodiversity present to a lower size, such condition is referred to as BOTTLENECK EFFECT.

3 0
3 years ago
In the study of human evolution, scientists define modern in terms of:
Lina20 [59]

<span>Answer:  a)  a series of anatomical traits that distinguish Cro-magnon features from Neandertals.</span>

<span>Neanderthals (Homo neanderthalensis) were first discovered in Germany in 1856 and are believed to emerged between 100,000 and 200,000 years ago. </span>

<span>Significant differences found in the human and </span>Neanderthal includes<span>: 1) their DNA, 2) the brain of a Neanderthal had a raised larynx and was also bigger, and  3) Compared to modern humans, Neanderthals had bigger and muscular body but with shorter legs.</span>

Cro-magnon is<span> the earliest known Western European example of our species who lived  35,000 and 10,000 years ago. They are believed to be actually modern in every anatomical respect. They are much like us.</span>

<span>Neanderthal and Cro-magnon were believed to overlap in Europe for a thousand years but long-term interbreeding was not seen. </span>

6 0
3 years ago
Pria's radio produces 80 useful energy units for every 100 units of electricity used. The efficiency of the radio is _____.
a_sh-v [17]
80%

hope this helps.
my sister is called pria too lol :)
8 0
4 years ago
Read 2 more answers
The best way to reduce wind erosion on a farm is to
kiruha [24]

The best way to reduce wind erosion on farm is to plant ground cover in unused fields.

Explanation:

  • Wind erosion is defined as the removal of the top soil from unused barren land by winds.
  • This results in degradation in the soil fertility and renders it unproductive.
  • Roots of plants bind soil particles.
  • Planting ground covers like herbs , shrubs and wild plants on unused land will prevent the exposure of the top soil to the eroding agents and reduce erosion.

6 0
4 years ago
By dissecting an owl pellet, you can learn __.
Debora [2.8K]
It’s really all of the above but i think the best answer is C :)) hope this helped !!
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3 years ago
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