Question

QUESTION 48 Eukaryotic organisms undergo, OBinary fsion because they have a nucleus Ob Mtoss OCNuclear fusion Od Peristalsis QUESTION 49 The monomeric subunit of DNA is Oa The nucleotide OB An amino acid OCAnucleus O4Acarbohydrate QUESTION S0 haploid cells After the completion of meiosis in humans, a diploid germ cell has produced cells with half the original chromosome number, generating O2

Answer 1

Question 48: Eukaryotic organisms undergo _ because they have a nucleus.

a. Binary fission b. Mitosis c. Nuclear fusion d. Peristalsis

Answer: b. Mitosis

Mitosis is a cell division process in which chromosomes undergo replication and get separated into two new nuclei, thus produces identical copies of cells.

Question 49: The monomeric subunit of DNA is:

a. The nucleotide b. An amino acid c. A nucleus d. A carbohydrate

Answer: a. The nucleotide

Nucleotides are the monomeric subunits of DNA. They are the basic building blocks of nucleic acids (DNA and RNA). The four nucleotide bases are adenine, cytosine, guanine and thymine. Each nucleotide base consists of a phosphate group, a deoxyribose sugar and a nitrogen-containing base.

Question 50: After the completion of meiosis in humans, a diploid germ cell has produced cells with half the original chromosome number generating _ haploid cells.

a. 2 b. 3 c. 4 o d. 23

Answer: c. 4

Meiosis is also called reductional division, and it produces four daughter cells with haploid (n) number of chromosomes. After the successive meiotic divisions, the number of original chromosomes in daughter cells get reduced from diploid to haploid number, and gives rise to four haploid cells. In human, each haploid parent cell contains 23 chromosomes. Fusion of haploid gametes produces zygote with diploid number of chromosomes. Zygote thus formed contains 46 number of chromosomes. After the completion of meiosis in humans, a diploid germ cell has produced cells with half the original chromosome number generating four haploid cells.