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Ne4ueva [31]
3 years ago
7

Which enzyme functions to prevent supercoiling of the DNA molecule during replication?

Biology
2 answers:
Zepler [3.9K]3 years ago
5 0

Answer:

Topoisomerase

Explanation:

I just did it on USATESTPREP

melamori03 [73]3 years ago
3 0

Answer:

The enzyme Topoisomerase functions to prevent super-coiling of the  DNA molecule during replication.

Explanation:

  • During replication, topoisomerases are required to relieve the positive supercoiling that arises from DNA unwiding mediated by Helicases.
  • A DNA topoisomerase is a nuclease that breaks a phosphodiester bond in a DNA strand.
  • All topoiomereases are classified as  Topoisomerase I and Topoisomerase II  depending on whether they cleave one or two strands respectively.
  • Topoisomerase I do not use ATP as a source of energy, the reaction is powered by energy stored in super-coiled DNA.
  • Topoisomerase II also do not require external energy but it utilizes ATP hydrolysis to drive conformation changes in the protein during reaction cycle.

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The graph below represents the solar intensity measured over one day in northern Canada. What is the most likely date?
Dmitry [639]
It is important to note that the graph has 0 solar intensity for a long part of the day; around 16 hours. Only from 8 to 16 hours do we have significant sunlight.
This means that the length of day is very short during this time of the year;

The length of the day changes throughout they year; day is equal to night (12 hours each) during the solstices on March 21 and September 23 but during summer day is longer than night in the northern hemisphere; during winter it is smaller. THe smallest daylength is at December 21st (in the northern Hemisphere). This phenomenon is due to the tilt of the axis of the earth.

The correct answer is December 21; (if we talked about a place in the southern hemisphere, the answer would be March 21).
6 0
3 years ago
What type of science does frankenstein learning from agrippa?
kramer
RowseNotessearch

HOMEWORK HELP > FRANKENSTEIN

What sort of science is Victor learning from Agrippa?

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EXPERT ANSWERS

LINDA-ALLEN | CERTIFIED EDUCATOR

Cornelius Agrippa (1486-1535) was a German mystic who practiced a "science" that combined alchemy, magic, mysticism, and astrology. Two of his books are Three Books of Occult Philosophy and On Calling Spirits. Through the writing of Agrippa, Frankenstein becomes very interested in alchemy, which is a pseudoscience whose main object is to find a way of turning base metals into gold. You could say that Frankenstein adapted the thinking of the alchemists and instead of transforming other metals into gold attempted to transform a corpse into a living being.

An interesting story about Agrippa concerns sightings of him after his death:

There were rumors that Agrippa had summoned demons on his death bed, and that a black dog roamed the countryside as his familiar. The black dog appears in tales as Faustus, Mephistopheles, and even as a grim in the Harry Potter series.

3 0
3 years ago
Which of the following is an example of kinetic energy
ArbitrLikvidat [17]
A.  Kinetic energy is the energy of motion.  B,C,D all describe situations where there is not movement.
8 0
3 years ago
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Which below are specialized for life in a hypotonic environment?
OLga [1]

Plant cells are specialized for life in a hypotonic environment.

Answer: Option A

<u>Explanation:</u>

A cell which lacks the cell wall, will expand and burst. At the point when set in a hypertonic solution, a cell without a cell wall will lose water to the surrounding, wilt and presumably die.

In a hypertonic arrangement, a cell with a cell divider will lose water as well. The plasma layer pulls from the cell wall as it withers, a procedure called plasmolysis. Thus it can be inferred that plant cell are specialized for life in a hypotonic environment.

8 0
3 years ago
The government of a flood prone region wants to implement some measure to reduce risk of floods. Which method is likely to reduc
Sonja [21]

Answer:

The correct answer is "preservation of wetlands".

Explanation:

Wetland are areas of lands that are saturated with water, usually comprised by marshes or swamps. Preservation of wetlands help to reduce the risk of floods because wetlands temporarily store and slow the release of stormwater. It has been reported that areas where wetland have been lost, the chances of flood increases by as much as 80 percent. The government of a flood-prone region would likely reduce the risk of floods by preserving its wetlands.

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