Which of the following statements regarding restriction enzymes is NOT true?
A) Most restriction enzymes recognize sequences of 20-25 bp in length.
B) Bacteria can add methyl groups to their DNA to prevent digestion by endogenous restriction enzymes.
C) Most restriction enzymes recognize palindromic sequences in host DNA.
D) Restriction enzymes may produce either sticky or blunt ends when digesting host DNA.

Answers

Answer 1

Answer:

The correct option is option A

Explanation:

Restriction enzymes are endocleases that cleave DNA fragment (of usually four, five or six nucleotide long) at specific sites to produce blunt or sticky ends. They recognize palindromic sequences of host DNA when cleaving the specific sites. The sequences below (on complementary strands) give an example of a palindromic sequences.

5'-CCC║GGG-3'

3'-GGG║CCC-5'

As can be seen above, when read from 5' to 3', the two sequences are the same despite being on opposing strands. And when cut between the guanine (G) and cytosine (C) (as shown above), it produces a blunt end. But when cut as shown below produces a sticky end.

5'- G║AATTC -3'

3'- CTTAA║G -5'

The explanation above shows options C and D are right while option A is wrong (hence the correct option).

Also, bacteria prevent their own DNA from been digested by restriction enzymes by adding methyl group to their restriction sites which prevents restriction enzymes from recognizing restriction sites of their DNA; this generally makes bacterial DNA to be highly methylated. This explanation makes option B right also.


Related Questions

Water molecules being attracted to other molecules (not water) is an example of?

Answers

Answer:

In cohesion, water molecules are attracted to each other (because of hydrogen bonding), keeping the molecules together at the liquid-gas (water-air) interface, although there is no more room in the glass.

what is a sum of people's skills, abilities, health and motivation?

Answers

Answer:

I think you are looking for the term Human Capital

Answer:Term. Human Capital. Definition. Sum of people's skills, abilities, health, knowledge and motivation.

Explanation:

Which genotype is written incorrectly? AaAP pApr iiYy

Answers

pApr. You can’t have the dominant allele be the second(pA) allele

2.
4.00
POOZE 1
nucleus outside smallest inside
electrons neutral element neutrons
largest
atom
Atoms are the smallest unit of an
Within the atom is a
which is the center of the atom. The
and
neutrons are located within the
The
are outside the nucleus. The neutron has a
charge. A helium atom is the
unit of an
element. The element helium has a mass of
A helium atom has
protons and
neutrons. The electrons are
located on the
of the

Answers

Answer:

1) element

2) nucleus

3) protons

4) nucleus

5) electrons

6) neutral

7) smallest

8) 4.00

9) 2

10) 2

11) outside

12) nucleus

Explanation:

i got help from my brother and mom btw lol.....

Why do mosses need a moist environment to reproduce sexually?

Answers

Answer:

So the sperm can travel to the egg

Explanation:

Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.

Interior layer of the Sun where hot and cooler gases circulate. A:convective zone B:chromosphere C:radiative zone D:corona

Answers

C is the answer

The answer is c

what keeps earth from flying outward into space from its present position

Answers

Answer:

Gravitational pull and the earth on its axis

Explanation:

Hope this helps

Gravitational pull and the earth on its axis keeps earth from flying outward into space from its present position.

what is Gravitational force ?

A gravitational force is defined as  an attractive force which is exerted by a massive body on the massive body. So our body always  tries to pull other body towards itself due to this gravitational force.

gravitational force is a force  exerted by earth on other objects  and can be represented as   F=mg

F is the force of gravity, G is the gravitational constant of the universe and it is always the same number, M is the mass of one object, m is the mass of the other object (measured in kilograms, kg), r can be the distance those objects are apart (measured in meters, m)

This force can also be called as Newton's Universal Law of Gravitation And the object that are really far apart from each other don't pull on each other noticeably either.

For more details regarding gravitational pull, visit

https://brainly.com/question/489075

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During which phase does the cell actually separate into two individual daughter cells?

Answers

Answer:

During which phase does the cell actually separate into two individual daughter cells? Explanation: Cytokinesis is the phase during which the cytoplasm of the cell divides and the cell actually separates into two cells. The term cytokinesis actually means cutting (kinesis) of the cytoplasm.

Explanation:

The parent cell separates into two individual daughter cells in the cytokinesis phase of mitosis. Details about cytokinesis can be found below.

cell.

What is cytokinesis?

Cytokinesis is the process in which the cytoplasm of a cell divides following the division of the nucleus.

Mitosis is the biological process by which living cells replicate themselves and create offsprings.

Mitosis primarily involves the division of the nucleus while Cytokinesis is the division of parent cells into daughter cells.

Therefore, the parent cell separates into two individual daughter cells in the cytokinesis phase of mitosis.

Learn more about cytokinesis at: https://brainly.com/question/10606931

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A water strider sits on the surface of a pond. This occurs because

Answers

Answer:

their legs contain specialized hairs that are able to repel the water and to capture the air

Explanation:

The water strider is one of the most common aquatic insects. Water striders can sit on the water surface due to they have specialized hydrophobic water-repelling hairs in their legs that allow them to use the surface tension of water in order to distribute the weight. Thus, the hairs in the legs of these insects enable them to float and move on the water surface.

what is inherited traits that increase an organisms chance of survival, also determine an organism’s niche.

Answers

Answer:

inherited traits that increase an organisms chance of survival , also determine an organisms niche

Explanation:

An adaptation is a variation , or genetic modification , that supports an organism , such as a plants or animals , endure in its environment

State any eight point about China Rose.​

Answers

Eight point about China Rose.

Based on the discovery of Ötzi the Iceman in 1991, which statement about the nature of scientific knowledge is true?


a. It is permanent.

b. It is changeable.

c. New evidence is often disregarded.

d. New evidence always confirms the previous evidence.

Answers

The correct answer is D

Answer:

B. It is changeable

Explanation:

Otzi changed our thoughts about early humans

Which of the following is not a surface of the lungs?
a. Mediastinal surface
b. Cardiac surface
c. Costal surface

Answers

C. Costal surface.

Please please pleaseeee tell me if this is wrong.

it should be b sorry if i’m wrong .

Define power and explain how to determine power. (4 poi

Answers

Answer:

Power is the rate of doing work

Power = work done/ time taken

Explanation:

PLZ HELP ME ASAP ITS DUE IN 1h

Answers

search them up lol , or go to quizlet they should have them .. hopes this helps :)

5. All matter is formed of tiny particles that are constantly __________________ .
a. The particles in a(n) _________________stay in one place but move
quickly back and forth in all directions.
b. The particles in a(n) ____________________can slide past one another.
c. The particles in a(n) ____________________ move freely.
6. The particles in matter _____________________one another.

Answers

Answer:

answer is

I stay uptalkin' to the moon.All my destiny and fatewritten in the star.carol, If I'm asking youThis question..."does he love you the way I can?"will you be mine :)

Я так сильно люблю тебя, Кэрол, до конца света ... будь моим ребенком

with love,

Martinez jade

Which ecosystem would be most sustainable if all the grasses died from severe drought

Answers

Answer:

Deserts

Explanation: Deserts need little to no water

Which of the following is not true about Darwin’s book On the Origin of Species?
a.
He worked on the manuscript for three years.
b.
It was successful.
c.
It explained his theory of evolution.
d.
It was based on his findings in South Africa.

Answers

Answer:

The correct answer is option D. It was based on his findings in South Africa.

Explanation:

The theory of natural selection was first planned in Darwin's book "On the Origin of Species" in 1859, which is the process by which life forms change after some time because of changes in heritable physical or behavioral qualities.

His book On the Origin of Species took three years time to complete as he worked on the manuscript for three years. It was successful book. However, it was not based on his work on africa.

Answer:

it's d

Explanation: just took the test

Cholera is a disease that is spread in water. Which would be the most practical way to prevent the spread of cholera in a human population? adding antibiotics to the water irradiating the water improving sanitation restricting use of natural water sources

Answers

Answer:

Hi! It's improving sanitation :)

Explanation:

edge2020

Improving sanitation would be the most practical way to prevent the spread of cholera in a human population.

How is cholera spread?

The cholera bacteria are passed through feces (poop). It is spread by eating or drinking food or water contaminated by the feces (poop) of an infected person. This occurs more often in underdeveloped countries lacking proper water supplies and sewage disposal.

Is cholera water or airborne?

Cholera is a diarrheal disease caused by the bacterium Vibrio cholera. It is almost always transmitted by water or food that has been contaminated by human waste.

Learn more about cholera here https://brainly.com/question/2034074

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Which of the following is a way humans use trees?
a.paper
b. food
c.wood
d. all of the above​

Answers

The answer is all of the above:)

Answer:

The answer is D: All the above

Explanation:

Just took the quiz

What do bones contain?

Answers

Answer:

Made mostly of collagen, bone is living, growing tissue. Collagen is a protein that provides a soft framework, and calcium phosphate is a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone strong and flexible enough to withstand stress.

Explanation:

hope that helps

Answer:

Bones contain a soft tissue called marrow.

Explanation:

edge 2021



realized
Linnaeus's ?

Answers

Answer:I dont not understand this question sorry

Explanation:

Answer and Explanation:

All modern classification systems have their roots in the Linnaean classification system. The Linnaean system is based on similarities in obvious physical traits. From the kingdom to the species. Each species is given a unique two-word Latin name.

If this isn't what you were asking then, sorry. I didn't understand the question but I sorta recongnized the word, "Linnaeus" so I thought this was what you were talking about.

The mushrooms thrived without hurting trees.

Answers

Answer:

Commensalism

Explanation:

One organism benefits and other is unaffected.

organs in different animal locomotion​

Answers

Answer:

cilia, legs, wings, arms, fins, or tails are sometimes referred to as locomotory organs or locomotory structures.

hope this helped you

please mark as the brainliest (ㆁωㆁ)

A student who studies the sizes of groups of birds records
data for this group of ducks.

Which two terms describe the relationship between the two variables in this graph

A:negative
B:strong
C:weak
D:positive

Answers

Negative and strong apex

Answer:

c

Explanation:

Give one similarity and one difference between the cell theory and the theory of
spontaneous generation.

Answers

Answer:

The fact that only cells are able to produce more cells is part of cell theory. The idea that organisms can develop independently of cells is called spontaneous generation, and it isn't supported by cell theory. Spontaneous generation suggests that living organisms develop from non-living matter.

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Describe in brief the various types of teeth in humans. Add a note on dental formula of man.

Answers

PLEASE GIVE BRAINLIST

PLEASE GIVE BRAINLIST

PLEASE GIVE BRAINLIST

PLEASE GIVE BRAINLIST

PLEASE GIVE BRAINLIST

8 incisors. 4 canines, also called cuspids. 8 premolars, also called bicuspids. 12 molars, including 4 wisdom teeth.

Human: deciduous teeth: 212/212; adult = 2123/2123. Both childhood molars are replaced by adult premolars. Adult total is double the formula = 32. Opossum: 5134/4134 (one less incisor on each side of the lower jaw).

HOPE THIS HELPED

[tex]\huge\bold\red{Answer:-}[/tex]

The dental formula represents the arrangement of teeth in each half of the upper and the lower jaw. The entire formula is multiplied by two to represent the total number of teeth.

The dental formula for milk teeth in humans is:

[tex] \frac{2102}{2102} = 2[/tex]

Each half of the upper jaw and the lower jaw has 2 incisors, 1 canine, and 2 molars. Premolars are absent in milk teeth hence the zero.

The dental formula for permanent teeth in humans is:

[tex] \frac{2123}{2123} = 32[/tex]

Each half of the upper jaw and the lower jaw has 2 incisors, 1 canine, 2 premolars, and 3 molars. An adult human has 32 permanent teeth.

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how are lipids like carbohydrates

Answers

Carbohydrates and lipids are both types of macromolecules found in living things. Carbohydrates are often referred to as sugars and are found in different forms such as glucose and maltose. Lipids are fats, oils, waxes and steroids and are made up of fatty acids.

Here you go I think this is the answer to your question. Complex carbohydrates (e.g. polysaccharides) and lipids both contain a lot of chemical energy and can be used for energy storage. Complex carbohydrates and lipids are both insoluble in water - they are not easily transported. Carbohydrates and lipids both burn cleaner than proteins (they do not yield nitrogenous wastes ...

The seed plants become dominant during the late when the climate became

Answers

Answer:

Cold

Explanation:

They can not survive in cold conditions

What helps water move across the
membrane quicker?

Answers

Answer:

The sell membrane

Explanation:

Hope it helped

Answer:

A channel protein

Explanation:

A channel protein, a type of transport protein, acts like a pore in the membrane that lets water molecules or small ions through quickly. Water channel proteins (aquaporins) allow water to diffuse across the membrane at a very fast rate. Ion channel proteins allow ions to diffuse across the membrane.

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