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2 years ago

The drawing below shows a portion of the cell membrane and all of the molecules that comprise it.

Biology

2 answers:

Anastasy [175]2 years ago

7 0

Answer:

Prevent the passage of certain molecules into the cell.

Explanation:

Cell membrane or plasma membrane consists of lipid bilayer in which proteins are embedded. The carbohydrates are present in the plasma membrane in association with lipids and proteins.

The cell membrane acts as the semi-permeable membrane that allows the movement of selected particles into and out of the cell. The molecules may enter through diffusion, osmosis or by active transport depending on the tyep of molecule.

Thus, the correct answer is option (C).

Alexeev081 [22]2 years ago

5 0

C. prevent the passage of certain molecules into the cell

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How many molecules of carbon dioxide are required to produce a 6-carbon sugar?

tino4ka555 [31]

Answer:

24 molecules

Explanation:

All the carbon in the sugar comes from CO2. 6 molecules of CO2 need to be fixed to form 1 molecule of glucose (a 6 carbon sugar). So 24 molecules of CO2 should enter the calvin cycle to produce a sugar that has 24 carbon atoms.

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3 years ago

Cystic fibrosis is an autosomal recessive disorder. In one population, the frequency of affected individuals (A 2 A 2) is 0.0004

Simora [160]

Hardy Weinberg Equilibrium

Explanation:

Hardy Weinberg Equilibrium formula for allelic frequency is: $p+q=1$

Hardy Weinberg Equilibrium formula for genotypic frequency is: $p^2+q^2+2pq=1$

Here, $p$ =frequency of dominant allele

$q$ =frequency of recessive allele

$p^2$ =frequency of dominant genotype

$q^2$ =frequency of recessive genotype

$2pq$ =frequency of heterozygous genotype

frequency of affected individuals=0.0004(given)

here,affected individuals means the one's having Cystic Fibrosis and since it is recessive disease so we can write frequency of recessive genotype as: $q^2$ =0.0004

If $q^2$ =0.0004 $q$ will be 0.02;frequency of recessive allele will be 0.02

Using the formula $p+q=1$

$p+0.02=1\\p=1-0.02=0.98$

hence,frequency of dominant allele will be 0.98

Frequency of dominant genotype will be $p^2=(0.98)^2=0.9604$
Frequency of heterozygous genotype will be $2pq=2*0.98*0.02=0.0392$

7 0

3 years ago

The difference in concentration between solutions on either side of a cell membrane is?

SpyIntel [72]

The difference in concentration between solutions on either side of a cell membrane is a concentration gradient.

In the field of biology, a concentration gradient can be described as a difference in the concentration of molecules inside and outside of a cell. It is due to concentration gradient that molecules move into and out of a cell through the cell membrane.

Some molecules move from an area of higher concentration gradient to an area of lower concentration along the concentration gradient. Diffusion is an example of such a process.

On the other hand, some molecules move from an area of lower concentration to an area of higher concentration against the concentration gradient. Active transport is an example of such a process.

To learn more about concentration gradient, click here:

brainly.com/question/13814995

#SPJ4

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1 year ago

Which describes the greenhouse effect? an artificial process a dangerous process a natural process a new process

Yuri [45]

The answer would be a dangerous process, this is because the greenhouse effect traps gasses such as CO2 and other harmful gasses emitted from the Earth, that can ultimately lead to problems in the future.

The greenhouse effect is also the reasoning behind why scientist believes in Global warming and climate change.

Plus, the greenhouse effect is neither natural, new, nor artificial.

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2 years ago

Read 2 more answers

What product do all three reactions in Model 2 have in common?

belka [17]

Answer;

-They all provide water

Explanation;

In reaction A, the reactants are glucose and fructose , and the products are Sucrose and water. This is a condensation reaction, following the combination of two monosaccharides (glucose and fructose) forming a dissaccharide (sucrose) and water.

In reaction B, the reactants are two amino acids, that results to formation of a dipeptide and water; this is also a condensation reaction joining two amino acids monomers, to form a dipeptide and water.

-In reaction C, a monoglyceride combines with a fatty acid to form a diglyceride and water. This is also an example of a condensation reaction that results to formation of a diglyceride and water.

Therefore, the similarity of all the reactions is that they are all condensation reactions, with water as a common product.

6 0

2 years ago