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maria [59]
2 years ago
7

The backbone of a nucleic acid molecule is made of

Biology
1 answer:
Sindrei [870]2 years ago
8 0

Answer:

sugar-phosphate forms the structural framework of nucleic acids, including DNA and RNA

Explanation:

A sugar-phosphate backbone joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

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What is the definition of the word enzyme
ANTONII [103]

Answer:

any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures

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3 years ago
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Ms. Carroll went to her doctor's office with pain in her right shoulder blade and learned she was having a gallbladder attack. Y
BARSIC [14]

Answer:

Gallbladder Shoulder Pain

Explanation:

Inflammation of the gallbladder, liver and pancreas occurs when gallstones develop in our body . Pressure on different types of nerves is produce when these organs develop inflammation. One of this nerve, the right phrenic nerve can travel upward towards the shoulder and upper back. When you apply pressure to the right phrenic nerve, it produces pain in the right shoulder. This is the reason why many medical resources acknowledge that right shoulder pain is one of the primary symptoms of a gallbladder attack.

7 0
3 years ago
Arrange the order of events for the internalization of LDL particles into cells:
ElenaW [278]

Answer:

The correct answer is "5-1-3-2-4".

Explanation:

Internalization of LDL particles into cells, is needed to form the intracellular vesicles known as endosomes. The order of events that allow for this process are:

5) LDL receptors migrate to the cell surface and cluster in clathrin-coated pits. Clathrin acts directing the receptors to the cell membrane region where endosomes are formed.

1) A combination of cholesterol and apolipoprotein binds to LDL receptors and becomes internalized as endocytotic vesicles. Once the receptors are in the proper cell membrane region, cholesterol and apolipoprotein are bound and internalized.

3) Several endocytotic vesicles fuse to form an endosome.

2) The environment of the endosome becomes acidic, which causes the LDL to dissociate from its receptor; additionally, the endosome fuses with a lysosome. LDL should be dissociated from its receptor since it is going to be degraded in the following step.

4) The LDL particle is degraded by the lysosome. This takes place after endocytosis, when LDL particles are transported into lysosomes once they are fused, cleaving the cholesterol esters into cholesterol and fatty acids.

6 0
4 years ago
So this is a simple yes or no question
Vilka [71]
Yes i think so, but not sure
8 0
3 years ago
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The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-Saharan Africa than among those o
ArbitrLikvidat [17]

Ans.

Sickle-cell disorder shows defected red blood cells, due to mutation in gene that code for hemoglobin. The mutated genes for sickle-cell disease are found in higher percentage of sub-Saharan African population as it provides protection against malaria as compared to population of United States.

Malaria is common in sub-Saharan Africa region and there, natural selection favored gene for sickle cells, because it might be beneficial to people having sickle cell disease that makes them able to survive in such condition and transmit their genes to offspring.

On the other hand, in those Africans, who moved to United States, where malaria is uncommon or absent, natural selection favored normal, wild type genes, resulting in fewer people with defected sickle cell.

Thus, the evolutionary process behind this is 'natural selection.'

5 0
3 years ago
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