Describe the role of a DNA helicase at a replication fork. A) DNA helicase connects the two strands of DNA at a replication fork.
B) DNA helicase helps another protein to connect the two strands of DNA at a replication fork.
C) DNA helicase helps another protein to separate the two strands of DNA at a replication fork.
D) DNA helicase separates the two strands of DNA at a replication fork.

Answers

Answer 1

Answer:

Answer:

DNA helicase separates the two strands of DNA at a replication fork.

Explanation:

To allow DNA replication, two DNA strands should be separated to serve as a template strand. DNA helicases are the enzymes that separate the two parental DNA strands in an energy-dependent way. DNA helicases move along the DNA and separate the two strands by breaking the hydrogen bonds between the complementary base pairs of two DNA strands. The energy released from ATP hydrolysis is used to break the hydrogen bonds.

Answer 2

Answer:

Answer:

Explanation:

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Selective cutting is different from clear-cutting,because in selective cutting A= no trees are cut down
B=all the trees are cut down
C=some trees are not cut down
D= there is a greater damage to the forest

Answers

c, some of my close family does logging stuff, and I hear about this all the time.

the answer to this question is c.

Have a great day

Peace

After running home from school, a girl wants to know how the carbon dioxide she is exhaling is produced. Which explanation BEST answers A. It is waste released from the heart.
B. It is an energy source from the lungs.
C. It is waste produced by the cells in her body.
D. It is an energy source produced by the cells in her body.
her question?

Answers

b it is an energy source from the lungs

Well its not A. So i would say B

The Galapagos Islands are where Charles Darwin

Answers

Answer:

Explanation:

Charles Darwin in the Galapagos. Perhaps our first association with the word "Galapagos" is the name "Darwin." Darwin's visit to the Galapagos Islands had a resounding impact on the formation of his Theory of Natural Selection. ... After surveying the coasts of South America, the ship stopped over in the Galapagos Islands.

Answer: visited and took samples to right about his book

Explanation: hope that helped

Explain how hypertension, heart disease, and stroke are related.

Answers

Hypertension, heart disease, and stoke are related because they all have to do with the heart. Hypertension is when you have high blood levels, heart disease is when your heart doesn't work properly, and stoke is when the heart beats hyperactively or the opposite.

Hypertension is another term for high blood pressure. This occurs when there is too much pressure put on the blood vessels. The heart gets affected because it is pumping against the pressure, which causes strain on the heart. This can cause thickening of the heart walls, which can lead to other heart problems.

Stroke occurs when there blood supply to the brain is reduced or obstructed. This deprives the brain of oxygen and other nutrients. The occurrence of stroke increases with blood pressure because there is persistent pressure on the vessels which can ultimately lead to stroke.

What are the spiral arms of the Milky Way made of? A. Older stars and comets
B. Variable stars
C. Asteroids and comets
D. Younger stars and gaseous nebulae

Answers

The spiral arms of the Milky Way are made of younger stars and gaseous nebulae. There are four spiral arms within the Milky Way galactic disc that start at the galaxy's center. The sun is five to 30 parsecs away from the center of the galactic disk.

younger stars and gaseous nebulae d is the corrcet answer

Which unit is part of the Sl system?
A. gram
B. pint
C. quart
D. gallon

Answers

Answer:

gram

Explanation:

A Gram is an internationally agreed unit of measurement.

gram - the rest are all part of the american system which is not often used in science

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