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V125BC [204]
2 years ago
11

Which of the following best explains why a cell's plasma membrane is composed of two layers of phospholipids rather than just a

single layer?
Biology
1 answer:
jarptica [38.1K]2 years ago
6 0

Answer: The hydrophilic tails are directed inward and the hydrophobic heads are directed outwards.

Explanation:

A phospholipid is made up of two ends a hydrophilic or water-loving end that is phosphate head and a hydrophobic tail that is made up of fatty acid tail. The arrangement of phospholipid in a bilayer structure allows the entry of oxygen, carbon dioxide, and lipids to pass through them via concentration gradient via simple diffusion.

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Which condition occurs in the presence of cellular damage? Cells shrink. ATP production increases. Osmotic pressure decreases. S
schepotkina [342]

Answer:

Sodium and water move into the cell

Explanation:

Sodium and water move into the cell. This is because

Cellular damage result in failure of the Na+/k+ pump, allowing movement of sodium ions into the cell. This concentration of sodium pulls water in, resulting in hydropic swelling. Cellular damage results in the cell's inability to perform normal metabolic functions because APT decreases and Osmotic finally pressure increases.

7 0
2 years ago
Which of the following differentiates B cells and T cells? a) T cells but not B cells can directly attack and destroy invading p
daser333 [38]
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he birds shown above have beaks with three different shapes and sizes.these genetic variations in the black each appeared initia
faust18 [17]

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mutations

Explanation:

5 0
2 years ago
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When we look at a leaf, we see the colors of light that are reflected off its surface. How does this explain the relatively low
anastassius [24]
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Hope this helps.
6 0
2 years ago
The process of protein denaturation Multiple Choice: a) is only possible in proteins with quaternary structure. b) is permanent
pav-90 [236]

Answer:

The correct option is D.

Explanation:

Protein generally are very sensitive macro molecules; they have specific temperatures and pH that are ideal for their operations, this is especially true for proteins that act as enzymes in biochemical reactions.

There are four different types of structures that a protein can assume, these are primary, secondary, tertiary and Quaternary structure. The structure of a protein determines the kind of function it can perform.

There are some factors that can destroy the structure and functions of proteins, these include excessive heat and pH. A protein is said to be denatured when its secondary and tertiary structure have been disrupted or destroyed. Denaturation does not affect the primary structure of the protein, thus, the peptide bond remains intact.

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7 0
2 years ago
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