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Vlada [557]
3 years ago
14

What is DNA labeled a double helix ​

Biology
2 answers:
beks73 [17]3 years ago
8 0

Answer:

Explanation:

The double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together. Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain.

alex41 [277]3 years ago
4 0

Answer:

The double helix is a description of the molecular shape of a double-stranded DNA molecule. ... Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain.

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Dysentery can lead to ________ and/or organ failure if medical attention is not sought in time.
klasskru [66]

Answer:

Option-B

Explanation:

Dysentery is an abnormal condition that is caused by the infection of the intestine in humans. The infection could be caused by the bacteria or the amoeba.

The disease can be characterized by the cramps in the stomach, diarrhea, and the loss of blood through feces.

Untreated dysentery can lead to the loss of a large amount of blood through feces and will lower the amount of blood in humans.

This severe loss of blood will give rise to another disease called hypovolemic shock is which the heart fails to pump enough blood to the organs due to which the other organs of the body can fail to work properly.  This condition can lead to death.

Thus, Option-B is correct.

4 0
3 years ago
Like all enzymes, restriction endonucleases (REs) need to be handled very carefully to ensure that they do not denature. Which o
andriy [413]

Answer:

The correct answer is:  d. REs activity is best preserved by freezing the RE and thawing it out for brief periods of time as needed.

Explanation:

  • Restriction enzymes can be defined as endonucleases that can recognize specific nucleotide sequence in a DNA (Deoxyribonucleic acid) sequence and cause breakage of phosphodiester bond in the DNA at the target site. Hence, it has the capacity of cleaving a DNA sequence.
  • These are made up of proteins which are required to be present in the accurately folded conformation in order to function.
  • Any form of alteration in the three-dimensional structure of the protein induced due to physical, chemical, mechanical or physiological factors can cause denaturation of the protein which in turn can render the protein non-functional.
  • Freezing of restriction enzymes (REs) directly without the use of glycerol will cause the movement of water molecules within the proteins as well layering of water molecules on the protein surface.
  • At low temperature these water molecules change to ice crystals which can alter the conformation of the protein or can cause breakage of peptide bonds in the proteins by physical force.
  • This can cause the protein to get denatured and hence non-functional.
  • Hence, it is never advisable to preserve REs by freezing directly without glycerol.
  • Glycerol forms a layer around the protein molecules and prevents the protein molecules from coming into direct contact with the water molecules and hence prevents protein denaturation.
7 0
3 years ago
6.1.3 Final Exam: Semester 2 Exam
pashok25 [27]

The parental phenotype is the mother's free earlobes (Ff) and the father's nonfree earlobes (ff).

<h3>What genotype and phenotype?</h3>

The genotype refers to the information present in an individual's genome. Unlike the phenotype, it is not observable and rarely changes. The phenotype, in turn, depends on a combination between our genotype and the environment and can be defined as the observable characteristics of an individual.

With this information, we can conclude that the parental phenotype is the mother's free earlobes (Ff) and the father's nonfree earlobes (ff).

Learn more about genotype in brainly.com/question/12116830

#SPJ1

8 0
2 years ago
What does it mean to be in the path of totality?(1 point)
tia_tia [17]

Answer:

Option B You are on part of Earth that is in the umbra of the moon’s shadow

Explanation:

Solar eclipses are observable in the shadow zone created by the Moon's occultation of the Sun. In the case of a total eclipse and only in this one, the shadow zone where it is possible to observe this phenomenon of total eclipse is called “path of totality“.

7 0
3 years ago
List molar concentrations (0.0 M, 0.2 M, etc.) at which water entered the potato strips. Why did water move into the potato stri
kati45 [8]

Answer:

- Water entered the potato strips because the potato cells contained higher concentration of solutes than its external environment.

- The solutions are hypotonic to the solution in the potato cells.

Explanation:

According to osmosis, water will move from a region where it is high in concentration to that region where it is low in concentration. However, a region with high solute concentration contains a low water concentration and vice versa.

Hence, according to this question, water is said to move into potato strips from solutions of molar concentrations like 0.0M, 0.2M etc. Water moved into the potato strips because potato cells contained higher concentration of solutes than its external environment. This means that the external solutions are HYPERTONIC i.e. low in solute concentration to the solution in the potato strips.

8 0
3 years ago
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