Biology Test - ...

Identify the regions of the transcription unit.

(A) Promoter

(B) Sigma factor

(C) Terminator

(D) The structural gene

Which of the following statements are correct?

(A) Sex education is necessary in schools to improve reproductive health awareness.

(B) Family planning programs aim to control population growth.

(C) Male contraceptive options are as abundant as female contraceptive options.

(D) Surgical methods of contraception are reversible and highly effective.

(E) MTP is legal in India but with strict conditions.

Which of the following statements are correct?

(A) Mendel's laws of inheritance are based on his experiments with garden peas.

(B) The F1 progeny in Mendel's experiments always exhibited a blending of traits.

(C) The Law of Dominance states that one allele can dominate the other in a heterozygous pair.

(D) In a monohybrid cross, only one of the parental traits is expressed in F1.

(E) The Law of Segregation states that alleles segregate randomly during gamete formation.

Which of the following statements are correct?

(A) A Punnett square helps predict the possible genotypes of offspring.

(B) The genotype of an organism can always be determined by its phenotype.

(C) Mendel’s Law of Segregation explains the independent assortment of alleles.

(D) In co-dominance, both alleles contribute equally to the phenotype.

(E) The Law of Dominance is applicable only when alleles are identical.

Which of the following statements are correct?

(A) The presence of two X chromosomes in humans results in a female genotype.

(B) In the XY system of sex determination, the Y chromosome determines male traits.

(C) Down's syndrome is caused by the presence of an extra chromosome 21.

(D) Haemophilia is a sex-linked recessive disorder transmitted through the Y chromosome.

(E) Klinefelter’s syndrome is characterized by the absence of an X chromosome.

Which of the following statements are correct?

(A) The human genome consists of 3 billion base pairs.

(B) The lac operon in bacteria is regulated by the presence of glucose.

(C) In the double helix structure of DNA, the sugar-phosphate backbone faces the interior.

(D) mRNA is synthesized from the 5' to 3' direction.

(E) Translation occurs in the cytoplasm of eukaryotic cells.