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3 years ago

How can i remember the cell membrane?

Biology

2 answers:

givi [52]3 years ago

5 0

Answer: Honestly I remember it by thinking of something from daily life.

Explanation:

Think of it as a concrete wall. It's ridged, hard, and you really can't get by it. Only special things can break it. Think of those special things as the nutrients for the plant.

Ipatiy [6.2K]3 years ago

4 0

I've always found silly ways to remember things.. it may not help you, but it's worth a try!

<span>Cell membrane - (not to be confused with the cell wall)... i visualise it as a sieve, where diffusion occurs (certain substances can move in and out of the cell). Remember in a plant cell, with a cell wall that the membrane is INSIDE the cell wall. </span>

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How might energy and matter leave the ecosystem

Lyrx [107]

You cant get rid of energy and matter in the ecosystem. Matter is recycled in the ecosystem if we get rid of that the ecosystem will die so we can't get rid of energy and matter because it helps our ecosystem.

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3 years ago

Read 2 more answers

Using sickle-cell anemia as a basis, describe what is meant by

just olya [345]

Answer: Sickle cell anemia is a molecular and genetic disease.

Sickle cell anemia is not infectious

Diseases caused by microorganisms are infectious.

Explanation: Sickle cell disease is a molecular disease,it involves molecular change in the structure of the molecular base present in the molecule DNA which caused the amino acids and the beta side of the hemoglobin to change accordingly.

It is genetic as it can be transferred from one generation to the next, children can inherit it from their parents.

A person can not be infected with Sickle cell anemia,it is not infectious unlike diseases caused by microorganisms that can infect others who come in contact with the disease either through blood or other routes.

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3 years ago

PLEASE HELP ME WITH THIS AND HURRY BEACAUSE I ONLY A HOUR TILL LIKE 1:45

joja [24]

Answer:

In Florida, measured in frequency of tornadoes for every 10,000 square miles, the coast between Tampa Bay and Fort Myers has a particularly high incidence, as do the western panhandle and parts of the Atlantic Coast.

Explanation:

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3 years ago

One method for separating polypeptides utilizes their different solubilities. The solubility of large polypeptides in water depe

Otrada [13]

Answer:

Polypeptides are composed of amino acids, and we know amino acids are differently charged, have different R groups, and also have different isoelectric points. Depending on different isoelectric points and charged groups, the polypeptides can be separated and because a protein has its lowest solubility on its isoelectric point.

So in this question,

(a) (Lys-Ala)3 ; this is highly positively charged (polar) at pH 7 than (Gly)20 which is uncharged except for the amino and carboxyl terminal.

(b) (Glu)20 ; it is highly negatively charged at pH 7 whereas (Phe-Met)3 is much less polar and hence less soluble.

(c) (Asn-Ser-His)5 ; at pH 3, because in (Ala-Asp-Gly)5 the carboxylate groups of Asp residues are partially protonated and neutral, whereas in (Asn-Ser-His)5 , the imidazole groups of His residues are fully protonated and positively charged.

(d) (Asn-Ser-His)5; at pH 6.0; both polymers have polar Ser sidechains, but (Asn-Ser-His)5 also has the polar Asn side chains and partially protonated His side chains.

Explanation:

3 0

3 years ago

Your body contains tens of thousands of different proteins, each with a specific structure and function. The unique three-dimens

Svetllana [295]

<h2><u>Full Question:</u></h2>

Your body contains tens of thousands of different proteins, each with a specific structure and function. The unique shape of each of these diverse proteins is based on several superimposed levels of structure. Which of the following statements is true?

a.The primary structure of a protein is the order of nucleic acids in a polypeptide.

b.The 20 amino acids found in proteins differ in the composition of their R groups, which may be either polar or charged.

c.Tertiary structure is the overall shape of a polypeptide, which may be stabilized by hydrophobic interactions, hydrogen bonds, ionic bonds, and covalent bonds

d.Quaternary structure is only found in proteins that have four identical polypeptide subunits.

e.Secondary structures, which include the alpha helix or beta pleated sheet, are held together by interactions between R groups.

<h2><u>Answer:</u></h2>

The 20 amino acids found in proteins differ in the composition of their R groups, which may be either polar or charged.

Option B.

<h3><u>Explanation:</u></h3>

The proteins are one of the most abundant biomolecule of the biosphere. The proteins are formed by the polymerization of the amino acids which are actually 20 in type. The amino acids are basically of the same framework - having an alpha carbon with which are attached a carboxy group, amino group, a hydrogen and a variable group on which the actual property of amino acid depends. There are 20 different variable groups and so, there are 20 different amino acids.

Among them, 8 are essential amino acids, not synthesized in body and rest 12 are non essential amino acids, synthesized in body. These variable groups are either alkyl group, or aromatic group. They may be polar or non polar.

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3 years ago