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3 years ago

The final shape of a protein is determined by the sequence of its amino acid residues. What determines this amino acid sequence?

Biology

2 answers:

exis [7]3 years ago

8 0

it is determined by a sequence of DNA that is in the gene, and for the resulting is mRNA

OlgaM077 [116]3 years ago

8 0

Answer:

What determines the amino acid sequence of a protein is the sequence of nitrogenous bases in DNA.

Explanation:

We know that proteins, substances essential for the functioning of the body, are a set of amino acids that are linked together by peptide bonds. The amino acid sequence of a protein will be determined by the arrangement of nitrogenous bases in an mRNA. This, in turn, will be produced from a DNA molecule. We can say, therefore, that DNA provides the information for the production of proteins.

The genetic code can be defined as the relationship between the cracks (codons) found in the mRNA and the amino acids found in a protein. Codons are cracks formed by nitrogenous bases (A, U, C and G).

The four nitrogenous bases can have 64 different combinations, therefore, there are 64 different codons. Of these codons, 61 will encode the 20 different types of existing amino acids. The other three codons (UAA, UAG and UGA) will be responsible for indicating the places where the synthesis ends, and are also called stop codons. They do not encode any amino acids and are not read by tRNA, but by proteins called release factors.

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2 years ago

In the context of sensory receptors, the intensity of the stimulus is communicated to the brain by varying the _____ of the acti

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3 years ago

In 1985 a biologist counted 750 pine trees in a 250 hectare forest. Using similar counting techniques, the biologist counted 1,2

Alisiya [41]

Answer:

Suppose that we have a given function f(x)

The average rate of change of the function between two values x₁ and x₂ is given by:

$r = \frac{f(x_2) - f(x_1)}{x_2 - x_1}$

a) We want to find the average (rate) of change on the size of population from 1985 to 1995.

We have that:

f(1985) = 750

f(1995) = 1500

Then we have:

$r = \frac{1500 - 750}{1995 - 1985} = 750/10 = 75$

This means that the population of trees increases, in average, at a rate of 75 trees per year.

b) What is the density of trees each year that they were counted?

This will be equal to the quotient between the number of trees and the area.

1985: number of trees = 750 pines

area = 250 ha

Then the density is:

D(1985) = (750 pines)/(250 ha) = 3 pines/ha

So 1985, there were 3 pines per hectare.

1990: number of trees = 1250 pines

area = 250 ha

Then the density is:

D(1990) = (1250 pines)/(250 ha) = 5 pines/ha

1995: number of trees = 1500 pines

area = 250 ha

The density is:

D(1995) = (1500 pines)/(250 ha) = 6 pines/ha

3) now we want to get the average change between 1985 and 1995 in the density, this will be:

$r = \frac{D(1995) - D(1885)}{1995 - 1985} = \frac{6 pines/ha - 3pines/ha}{10} = 0.3 pines/ha$

So, on average, each year the number of pines per hectare increases by 0.3

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3 years ago