Question

1. All lipids are composed of non-polar hydrocarbon tails and a polar head group.

Select one:

a. True

b. False

2. In a diploid cell in M phase, the homologous chromosomes are identical.

Select one:

a. True

b. False

Answer 1

1. True

Lipids compose of non polar hydrocarbon tails and polar hydrophilic tail. Lipids play a major role in cell structure and metabolism. Lipids include fats , saturated and unsaturated fatty acids, phospholipids and sterols. Lipids are non polar and insoluble in water.

2. False

The M phase includes Mitosis and cytokinens. The M Phase represents the phase when the actual cell division or mitosis occurs and the interphase represents the phase between twosuccessive M phases. During metaphase, chromosome is made up of two sister chromatids, which are held together by the centromere called homologous chromosomes. In mitosis one chromosome of each homologous pair comes from the mother and one comes from the father .Homologous chromosomes are similiar but not identical.