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Firdavs [7]
1 year ago
9

What type of covalent bond is responsible for holding together the secondary structure of proteins

Biology
1 answer:
Trava [24]1 year ago
5 0

Answer :Hydrogen Bonds

Explanation:

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Tumors of the parathyroid gland often result in secretion of excess parathyroid hormone. Considering the function of this hormon
Luda [366]

Answer:

Parathyroid hormone increases the level of calcium while calcitonin hormone  decreases the level of calcium in the blood.

Explanation:

Parathyroid hormone is a type of harmone which is responsible for balancing calcium in our body. When the calcium level lowers in our body, parathyroid hormone is secreted and calcium is absorbed from the bones and fullfilled the requirement of the body. If the tumor secreted calcitonin hormone instead of parathyroid hormone, the calcium level in the blood is lowered because it acts to the opposite of parathyroid hormone.

4 0
3 years ago
The illustration below shows the steps of meiosis I. What is the step that is labeled D? metaphase I metaphase II telophase II t
WITCHER [35]

The right answer is metaphase II.

The process is performed in two nuclear and cytoplasmic divisions, called first and second meiotic division or simply meiosis I and meiosis II. Both include prophase, metaphase, anaphase, and telophase. First division prophase is long and consists of 5 stages: leptotene, zygotene, pachytene, diplotene, and diakinesis. It is at this point that genetic recombination takes place at the level of chiasmus.

During meiosis I, the members of each homologous pair of chromosomes are paired during prophase, forming bivalents. During this phase, a protein structure, called synaptonemal complex form, allows recombination between homologous chromosomes. Subsequently, a large condensation of the bivalent chromosomes occurs and go to the metaphase plate during the first metaphase, resulting in the migration of n chromosomes to each of the poles during the first anaphase. This reduction division is responsible for maintaining the number of chromosomes characteristic of each species.

In meiosis II, as in mitosis, the sister chromatids comprising each chromosome are separated and distributed between the nuclei of the daughter cells. Between these two successive steps, there is no DNA replication. The maturation of the daughter cells will result in the gametes.

7 0
2 years ago
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Which statement is an example of a feedback mechanism in humans
ExtremeBDS [4]

Answer:

1.

Explanation:

Controlling the level of sugar in the blood is an example of a feedback mechanism

8 0
2 years ago
1. a closed circulatory system is one in which
lys-0071 [83]
Just took the quick check 100%!! Lets keep it 100.

1. B  (Blood flows through a system of blood vessels and throughout the body)
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3.B (</span><span>Oysters do not move around, but squid are very active)
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5.A (</span><span>Exchanging carbon dioxide for oxygen from the air)</span>
6 0
3 years ago
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Which characteristic of a pine tree is an adaptation to the climate of the northwestern coniferous forests? Deep roots Conical s
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I’d say conical shape- coniferous trees are known for this shape.
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