BIOLOGY HIGH SCHOOL

WHAT IS THE cell membrane gateway system is specifically called the

Answers

Answer 1
Answer: It's called the sodium‐potassium pump.

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Where is chlorophyll found in green algae?In the cytoplasm
In chloroplasts
In the nucleus
In ribosomes

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in chloroplast.......

in chloroplast

brainliest plzzzz

What do the pancreas, liver, salivary glandsand gall bladder all have in common

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The pancreas, liver, salivary gland and the gall bladder are all digestive accessory organs. These organs aid the process digestion, ingestion, and absorption before the food intake of an individual reached the stomach, small intestine, and large intestine. 

Traits are determined by

ribosomes
vacuoles
genes
mitosis

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Traits are determined by genes

Ethyl alcohol and carbon dioxide are the end products of

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Ethyl alcohol and carbon dioxide are the end products of Alcoholic fermentation.
Alcoholic fermentation.

_____ phase is the period of interphase when genetic information is being duplicated. M phase
G1 phase
G2 phase
S phase

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During synthesis phase (S phase), the genetic material is duplicated. The cell duplicates its chromosomes. This leads to the presence of two sister chromatids in each chromosome. The cell then becomes ready for enetring into the prophase of te mitosis.

Which of the following best describes the structure of a biological membrane? ? A. two layers of phospholipids (with opposite orientations of the phospholipids in each layer) with each layer covered on the outside with proteins B. a fluid structure in which phospholipids and proteins move freely between sides of the membrane C. a mixture of covalently linked phospholipids and proteins...

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I believe it would be A, due to the fact that biological membranes usually have a phospholipid bilayer that is embedded with proteins.

Final answer:

The structure of a biological membrane consists of a bilayer of phospholipids, housing proteins and cholesterol, with an outward-facing surface adorned with carbohydrate-protein and lipid complexes. The composition allows a fluid movement of proteins within the plane of the membrane, and a selective permeability due to its hydrophobic interior.

Explanation:

The structure of a biological membrane, often referred to as the fluid mosaic model, consists of two layers of phospholipids forming a bilayer. These phospholipids have hydrophilic heads that face outward, one layer exposed to the inside of the cell and the other exposed to the outside. Between these layers, the hydrophobic tails meet, creating a hydrophobic interior.

The proteins are embedded within this phospholipid bilayer and can move freely within the plane of the membrane. Cholesterol is also present in the biological membrane contributing to its fluidity. Some of these proteins also serve to transport materials into or out of the cell.

Also associated with the phospholipid bilayer are carbohydrates attached to some of the proteins and lipids on the membrane's outward-facing surface. These form complexes that function to identify the cell to other cells.

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