In DNA, which of the following base pairs is correct? (a) A—T (b) A—T (c) G = C (d) G—C

Compare the steps of mitosis in plant cells and animal cells and select which are correct: Mitosis in plant cell Mitosis in animal cell I. Spindle is formed from the cytoplasm. I. Spindle is formed from centrioles or asters. II. Cytokinesis occurs by cell plate formation. II. Cytokinesis occurs by cleavage furrow formation. III. Centrosomes are not involved. III. Centrosomes form from centrioles and are involved in mitosis. IV. Division of cytoplasm occurs through the formation of a cell plate. IV. Division of cytoplasm occurs through furrow formation. Which are correct? (a) I, IV (b) II, IV (c) II, III (d) III, IV

____ having special polarity protects the two ends of chromosome from erosion.

What is the function of lysosome?

On the basis of the relationship in the first related pair of words, write a suitable word in the gap of the second pair. Purine : Adenine :: Pyrimidine : _____

What is the function of the ribosome?

Which structural part of a chromosome may occur either in the middle or at any one end of the Chromosome? (a) Telomere (b) Nucleolar Organizer (c) Satellite (d) Centromere

On the basis of the relationship in the first related pair of words, write a suitable word in the gap of the second pair: Mitosis : Equational division :: ____ : Reduction division

____ cell division maintains the number of chromosomes constant in a species.

Which of the following is correct regarding the Chemical Composition of nucleotide? (a) 5 - C Sugar + Phosphoric Acid = Nucleotide (b) Nitrogenous base + Phosphoric Acid = Nucleotide (c) 5 - C Sugar + Nitrogenous base = Nucleotide (d) 5 - C Sugar + Nitrogenous base + Phosphoric Acid = Nucleotide

Which cell organelle is termed as “power house” of cell?

In which phase of Interphase are the proteins essential for the formation of spindle fibres synthesized?