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3 years ago

The Kuiper Belt is a region beyond Neptune containing _____.

1 answer:

4 0

The Kuiper Belt is a disk shaped region of space beyond Neptune that is home to millions of asteroids. The region extends from a distance of 30 astronomical units to a distance of 50 astronomical units from the Sun. As well as asteroids, three dwarf planets can also be found within the Kuiper belt and these are named Pluto, Haumea and Makemake.

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The analysis toolpak can be activated through which sequence of steps

k0ka [10]

The analysis ToolPak is an add-in for Microsoft Excel program. The analysis ToolPak contains data analysis tools that can be used for financial, engineering and statistical data evaluation. The analysis Toolpak can be activated through the following sequence of steps;

File-->Options-->Add-ins -->Manage Excel Add-Ins --> Go.

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3 years ago

The organism in this photograph would most likely produce oceanic sediments that are

BlackZzzverrR [31]

The organism in this photograph would most likely produce oceanic sediments that are <span>calcareous.</span>

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3 years ago

What things are recycled during photosynthesis and respiration ?

dmitriy555 [2]

Respiration= oxygen is converted to CO2
Photosythiesis=sunlight is converted to food for the plant through the chloroplasts and then the plant lets out Oxyegen and takes in CO2

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3 years ago

PRL production is controlled by hormones produced in the hypothalamus. In response to either the presence or absence of a specif

dangina [55]

Answer:

Here, the stimulus which is discussed in the question is the Suckling stimulus which is also known as Suckling reflex.

Suckling by a child stimulates the suckling reflex system. The stimulus (information) reaches to the Hypothalamus. Hypothalamus triggers the TRH (thyrotropin-releasing hormone) which further triggers the releases of the Prolactin (PRL) hormone by the Anterior Pituitary.

Finally, when Prolactin reaches the blood, it stimulates the Mammary glands which being stimulated, start to produce milk.

Explanation:

The main function of Prolactin is to produce milk. Prolactin production is mainly controlled by Hypothalamus. Prolactin hormone is produced in Pituitary, uterus, etc. The prolactin hormone production is also controlled by the estrogen.

Prolactin regulation is also controlled by Dopamine and Oestrogen. Both of them regulates the onset and stoppage of prolactin production by sending the information to the pituitary gland. Dopamine mainly blocks the production when the level of prolactin is too high in the blood. Oestrogen mainly increases the production when the level of prolactin in the blood is too low.

Not only Prolactin boost up the milk production but it also helps in maintaining the female's body metabolism, immune system, regulating the menstrual cycle, and regulating body fluid levels. In males, it increases sperm production.

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3 years ago

Which structural component is found in DNA but not in RNA?

Over [174]

I believe the correct answer is B. Deoxyribose

<h2>Explanation:</h2>

The nucleotide of a DNA is slightly different to that of RNA due to an addition of a hydroxyl (OH) on the sugar molecule on the RNA nucleotide located on position 2 of the nucleotide.

<h2>Further Explanation:</h2>

The DNA and RNA molecules are almost similar.

<h3>1. Nitrogenous bases</h3>

They both have a nitrogenous base on position one. The nitrogenous base can be one of the 5 bases Adenine, Cytosine, Guanine or Thymine which can be coded by their alternate Uracil in the right places. They are considered to be the building blocks of the DNA and RNA molecules.

<h3>2. Phosphate group</h3>

Located on position 5 of the nucleotide of both in RNA and DNA is the phosphate group. It has important functions including forming part of an ATP molecule to provide the body with the required energy. They also activate proteins through a process called phosphorilation for example in the cAMP cycle they activate protein kinases.

<h3>3. Ribose</h3>

On the second carbon position there is a ribose sugar. It has only one oxygen molecule linked to each one of the 5 carbon atoms. On the second carbon position, the oxygen molecule is bound to a hydrogen atom forming a hydroxyl (OH). It is only in the RNA that the ribose sugar exists giving it its name; Riboneucleic acid.

<h3>4. Deoxyribose</h3>

The prefix deoxy- means that lack of oxygen. That is where the name deoxyribonucleic acid (DNA) comes from. On the second carbon position of the nucleotide is where there is lack of the oxygen molecule that usually binds to the carbon and hydrogen molecules leaving a hydrogen only bound to the 2nd carbon position. This sugar is only found in the DNA molecule. This small lack of an oxygen bound to the hydrogen allows specific enzymes to be able to identify the difference between a DNA molecule and an RNA molecule.

<h2>Learn More:</h2>

Level: College

Subject: Biology

Topic: Genetics

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3 years ago

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