Why can't humans digest all carbohydrates ?

1 answer:

6 0

The enzymes that digest carbohydrates are very specific and can only digest specific glucose monomers of a Polysaccharides. For example our body can digest starch since its made up of α-glucose monomers (the difference of α-glucose and β-glucose is just on the location of the hydroxl group). However Polysaccharides like cellulose are indigestible because cellulose is made up of β-glucose and the enzyme which digests polysaccharides in humans (amylase) cannot detect β-glucose linkages.

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Which of the graphics best represents an animal cell A B

Schach [20]

Animal cells are very close to plant cells, but they have one key difference that separates them; the cell wall.

A cell wall is a thicker layer on the outside of the cell membrane. These are unique, and are only found in plant cells. Animal cells just have the cell membrane as their outer part. This enables them to change shape due to the membrane being very flexible.

Plant cells do not change, and only conform to their cell wall's shape. This enables them to grow up (literally) to help gather sunlight and enable photosynthesis.

5 0

3 years ago

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A man heterozygous for long eyelashes marries a woman with short eyelashes. Draw a punnett square to determine the possible geno

zheka24 [161]

Answer:

See the attached for the Punnet square

Likelihood of their child having short eye lashes - 50% or 1/2

Explanation:

Let the allele for eye lashes be represented by E. Homozygous genotype will be EE (for long eye lashes) or ee (for short eye lashes) while heterozygous genotype will be Ee. Assuming long eye lashes allele E is dominant over shor short eye lashes e:

Heterozygous man marries a short eye lashes woman: Ee x ee

Ee x ee = Ee (long lashes), Ee (long lashes), ee (short lashes) and ee (short lashes.

That is, 50% or 1/2 of the offspring will have long eye lashes while the remaining 50% or 1/2 will have short eye lashes.