Answer:
An amino acid activates the repressor so that the repressor binds to the operator and prevents transcription.
Explanation:
In an operon, promoter is followed by operator which is finally followed by the structural genes to be transcribed. RNA Polymerase binds to the promoter and initiates transcription. A repressor can negatively control the transcription process by binding to the operator so that the RNA Polymerase is not able to move forward and transcription is halted.
For example: in trp operon, tryptophan amino acid binds to the repressor molecule which leads to change in repressor's shape. The repressor is now able to bind to the operator and prevent transcription.
Answer:
The correct option is D
Explanation:
Beta-thalassemia major is a hereditary disorder that usually causes severe anaemia. This mutation/disorder eventually leads to death if untreated especially during in the first two years of infancy. The treatment usually involves the transfusion of blood to clear the phenotypic blockage caused by the mutation. However, it requires both alleles to have the thalessemia mutation for a patient to be said to have beta-thalassemia major. Hence, <u>it is </u><u>not true</u><u> that it involves just the x allele and thus affects males more often than females</u>.
The correct answer is 3. A, C and D
Square labels A, C and D are to be marked as "green pods."
According to Mendel’s laws of inheritance, when a plant with dominant trait is crossed with plant with recessive trait, as a result dominant phenotype is appeared in all the F1 offspring. On Selfing F1 offspring, produces F2 offspring with dominant and recessive trait. In the given scenario, pea plant with ‘green pods’ are dominant and pea plant with ‘yellow pods’ is recessive. Therefore, when pea plant with green pod is crossed with pea plant with yellow pods, the F1 offspring (C) produced are with green pods. Thus, parent (A) is with green pods and F2 offspring (D) is with green pods.
troposphere, troposphere is where all the weather comes from
