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adoni [48]
2 years ago
14

What is the backbone of DNA composed of (choose all that apply)

Biology
2 answers:
Gelneren [198K]2 years ago
8 0

Answer:

nitrogen base

Explanation:

as it is nitrogen that is fixed to make protein bonds

VladimirAG [237]2 years ago
7 0

Answer:

Nitrogen base

Explanation:

The backbone of DNA is composed of the nitrogen bases.

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Which two macromolecules are the main sources of energy?
Leya [2.2K]

Answer:

Lipids (fats) and carbohydrates

Explanation:

Carbohydrates can be directly broken into glucose for use in cellular respiration. Lipids are used to store energy for extended periods of time. Proteins can be used for energy, but are not as efficient or quick as the previously mentioned macromolecules.

3 0
2 years ago
What kind of authority does our elected government officials exercise?​
il63 [147K]

Answer:

Depending upon the country and community in which you live, the authority exercised by elected officials is defined by formal rules and informal norms of behavior that apply in that jurisdiction. Authority is the willing compliance, almost automatic, with dictates from figures to whom we grant that authority. The formal rules limiting government officials’ authority should protect citizens from abuses of that authority but informal norms may sometimes allow elected officials to get away with actions that violate those rules or, at least, bend them to their own purposes.

6 0
3 years ago
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portion of an rna molecule that dose not contain information for making a protein and is removed prior to the rna molecule leavi
icang [17]

Explanation:

exons.

exons are the uncoding part of RNA which is removed to form mature RNA.

4 0
1 year ago
Organ where carbohydrate absorption occurs
Rina8888 [55]

Answer: Small intestines

Explanation: Digestion of carbohydrates begins in the mouth mechanically and through salivary amylase. It passes down to the stomach by parastalsis, digested further and goes to the small intestines where their absorption begins. Carbohydrates are a source of glucose, that most organs use as their primary energy source. Indigestible carbohydrates and fibers travels down to the large intestines where they are digested by bacteria or eliminated as waste through the anus.

The small intestines consist of microvilli that increase surface area for maximum nutrient absorption. Carbohydrates are absorbed by the small intestines via the jejunum, taken to the blood stream then transported to the liver where glycolysis and most metabolic pathways take place, for energy production.

8 0
3 years ago
Sponges have no "true tissues." what does this mean
artcher [175]
<span>Sponges have cellular-level organization, meaning that that their cells are specialized so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells. This is the simplest kind of cellular organization found among parazoans.

<em>I hope this helps!~</em><em /></span>
6 0
3 years ago
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