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olchik [2.2K]
3 years ago
8

Use the information extracted from the figure below to answer the following question.

Biology
1 answer:
Sergio [31]3 years ago
6 0

Answer:

huh

Explanation:

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How do nucleus and riboson work together
vitfil [10]

<u><em>Answer:</em></u>

<em>The nucleus and ribosomes both involve messenger RNA (mRNA) during protein synthesis. The mRNA is made during transcription within the nucleus. The mRNA then travels out to the cytoplasm via a nuclear pore of the nucleus.</em>

<em />

<u><em>Explanation:</em></u>

<em>*Hope this helped*</em>

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3 0
3 years ago
What is the material that phases instert into bacteria
Mademuasel [1]
Dk d s s s sixjd dj ndjs. id
6 0
3 years ago
Nocturnal animals are important pollinators. What niche do they
Shtirlitz [24]

Answer:

C. They pollinate the flowers that only open at night.

Explanation:

A niche is the functional role an organism performs in the ecosystem. Simply, the question is asking for the role of nocturnal animals as pollinators.

  • A pollinator is any organism the helps plants to transfer pollen grain from the anther of one flower to the stigma of another.
  • This way, fertilization and crossing of genetic materials is achieved.

Nocturnal animals are animals that are very active at night. This is an evolutionary advantage for them because there is less danger at this point of the day.

Therefore, some nocturnal animals can help to pollinate flowers that only open at night.

3 0
2 years ago
Describe the changes that take place during the menstrual cycle from Day 5-13 to the following:
erastovalidia [21]

Answer:

Between days 5 and 13 of a woman's menstrual cycle, an unfertilized egg in ovary prepares its development and maturation within the follicle, while the lining of the uterus -the endometrium- progressively enlarges.

Explanation:

Under normal conditions, a woman's menstrual cycle lasts 28 to 30 days, during which time both hormonal and physiological changes occur as part of the reproductive process.

Menstruation occurs as a result of the shedding of the endometrium, which had previously developed to facilitate the implantation of a possible pregnancy. This phase usually lasts five days and is characterized by genital bleeding.

From the fifth to the 13th day, a woman's reproductive system undergoes changes in preparation for possible fertilization and pregnancy:

  • <em>The unfertilized egg</em><em> is found inside the ovarian follicle, maturing before its imminent release, under the influence of follicle-stimulating hormone (FSH). The maturation of a few follicles occurs simultaneously, but only one will reach the necessary maturity to allow the release of the egg. </em>
  • <em>The lining of the uterus</em><em>, called the endometrium, receives signals from the hormone estradiol -produced by the mature ovarian follicle- and induces proliferation and thickening of the endometrium.</em>

Approximately on the 15th day of the menstrual cycle, the egg is released and it is the time when it can be fertilized by a sperm to produce the zygote, which will start a pregnancy in women.

Learn more:

Purpose of the menstrual cycle brainly.com/question/1483249

6 0
3 years ago
Select the true statements about protein secondary structure.
saul85 [17]

Answer:

C.The β‑pleated sheet is held together by hydrogen bonds between adjacent segments.

Explanation:

Hello!

The most common secondary structures are α-helix and β-sheets. The structures are defined by regular hydrogen bonds formed between the N-H and C=O groups of the amino acids that form the chain. These structures form in segments of the protein as an intermediate before it folds into the 3D tertiary structure.

<u>α helix  </u>

It is a cylindrical structure that comprehends a helical backbone, while the side chains extend outward in a helical distribution. The α-helix stabilizes through hydrogen bonds between the amines and carbonyls groups of the backbone. Each carbonyl group forms a hydrogen bond with the amine group four residues later in the main chain. Thus, except for the amino acids near the end of the α-helix, all the carbonyls and amines groups in the main chain are linked by hydrogen bonds. Each residue corresponds to a translation of 1,5Ǻ and a turn of 100º this equals 3,6 residues per turn.

From the observer point of view, if the rotation of the helix is clockwise or right-handed, it's called dextrorotation and if the rotation is counterclockwise or left-handed it's called levorotation. Dexorotation or dextrogyre is the most common rotation of α-helixes in proteins. Levorotation or levogyre is very rare but can be found in proteins with a large content of achiral glycine.

<u>β-sheets (β-pleated sheets) </u>

This structure consists of at least two β-strands (polypeptide chains), the strands conform a backbone of three to ten amino acids in an extended formation that connects laterally with hydrogen bonds. The distance between adjacent amino acids in a β-strand is approximately 3,5Ǻ in contrast to the 1,5Ǻ distance of an α helix. The chains that form a β-sheet have directionality conferred by their N-terminus and C-terminus. Adjacent β-strands can form hydrogen bonds in antiparallel, parallel or mixed arrangements. In the antiparallel arrangement, the adjacent strands are said to have opposite directions (N-C vs C-N) this allows the bonds to be established between the amines and carbonyls groups of each amino acid with the carbonyls and amines of the adjacent amino acid. This way the bonds between carbonyls and amines are planar, which allows strong interstrand stability.

In the parallel arrangement, the adjacent strands have the same direction (N-C vs N-C). In this type of arrangement, each amine forms a hydrogen bond with the carbonyl of the adjacent amino acid, but its carbonyl group forms a hydrogen bond with the amine group of the amino acid two residues later.

I hope you have a SUPER day!

6 0
3 years ago
Read 2 more answers
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