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WINSTONCH [101]
3 years ago
14

At what temperature does the maximum activity of enzyme b occur

Biology
1 answer:
atroni [7]3 years ago
4 0

Answer

           Enzymes have an optimum temperatue at which they work fastest. For mammalian enzyme this is about 40°C, but there are enzymes that work best at very different temperatue.

                        Forexample, enzymes from arctic snow flea work at -10°C, and enzymes from thermophilic bacteria work at 90°C. up to the optimum temperatue the rate increases geometrically with temperature. The rate increases because enzyme and substrate molecules both have more kinetic energy so collide more often and also because more molecules have sufficient energy to overcome the activation energy.

                        Enzyme can even works in ice, though the rate is extremely slow due to the very slow diffusion of enzyme and substrate molecules through the ice lattice.

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genetics book g how do you know that only a single gene is responsible for he color diferences between these snakes?
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Here is the full question:

An albino corn snake is crossed with a normal colored corn snake. The offspring are all normal-colored. When the first generation progeny snakes are crossed among themselves, they produce 32 normal colored snakes and 10 albino snakes.

a. How do you know that only a single gene is responsible for the color differences between these snakes?

b. which of these phenotypes is controlled by the dominant allele?

c. a normal colored female snake is involved in a test cross. This cross produces 10 normal colored and 11 albina offspring. what are the genotypes of the parents?

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First of all, in genetics, Phenotype are the observable physical properties of an organism; these include the organism's appearance, development, and behavior. An organism's phenotype can be determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences on these genes.

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(a) In the question, we have two phenotypes seen in the second generation of this cross: normal and albino. Therefore, only one gene with two alleles is needed to control the phenotypes like colour of the snakes observed. The 3:1 ratio of these phenotypes in the F2 generation will be seen only if a single gene is involved.

(b) The allele controlling the normal phenotype (A) is dominant to the allele controlling the albino phenotype (a).

(c) The male parent’s genotype is aa. The normally colored offspring must receive an A allele from the mother, so the genotype of the normal offspring of the testcross is Aa. The albino offspring must receive an a allele from the mother, so the genotype of the albino offspring of the testcross is aa. Thus, the female parent must be heterozygous Aa.

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