Biology Questions with Answers

Answer: Option [D]

The correct answer is Artificial sysnthesis of DNA. The Nobel prize in Medicine 1959 was awarded jointly to Severo Ochoa and Arthur Kornberg for their discovery of the mechanisms in the biological synthesis of ribonucleic acid and deoxyribonucleic acid.

Answer: Option [B]

The chromosomes except those relating to sex are known as Autosomes. An autosome is one of the numbered chromosomes, as opposed to the sex chromosomes. Humans have 22 pairs of autosomes and one pair of sex chromosomes (XX or XY). Autosomes are numbered roughly in relation to their sizes.

Answer: Option [A]

Chromosome set in zygote is 2n. A zygote is considered a eukaryotic cell that is formed by fertilisation. Two haploid cells (gametes) are fused and a zygote is formed. It is diploid in nature. A human zygote possesses 46 chromosomes. Zygote contains two sets of 23 chromosomes for the required 46 chromosomes in humans and the respective number in other animals as well.

Answer: Option [B]

Number of autosome in a normal female is 22. Human have 46 chromosomes present in 23 pairs in which only one is sex chromosome and rest are autosomes that are responsible for the transfer of genetic information from parents to progeny. Each sperm cell contains 23 chromosomes : 22 autosomes and one sex chromosome (X or Y). Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size.

Answer: Option [D]

The correct answer is Autosomes. The first 22 pairs of chromosomes are known as autosomes. These are homologous chromosomes, which means that their chromosomal sides have the same genes (DNA sections) in a similar sequence.