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

What happens if the functions of checkpoints in the cell cycle get hampered?

A pair of related terms is given below. On the basis of the relationship in the first pair write the suitable word in the gap of the second pair. Purine : Adenine : : Pyrimidine : ____

Each nucleoside contains a nitrogenous base and phosphoric acid.

Select the correct pair in the case of humans: (a) Normal pattern of chromosome of ovum — 22A + XX (b) Normal pattern of chromosome of ovum — 22A + Y (c) Normal pattern of chromosome of ovum — 22A + X (d) Normal pattern of chromosome of ovum — 22A + XY

The name of the terminal parts of the Chromosome is — (a) Centromere (b) Telomere (c) Nucleolar Organizer (d) Satellite

Select the correct pair — (a) Telophase — Movement of daughter chromosomes towards poles (b) Telophase — Disappearance of Nuclear Membrane and Nucleolus (c) Telophase — Formation of spindle fibre (d) Telophase — Reappearance of Nuclear Membrane and Nucleolus

Write one function each of ribosome and lysosome.

Write the functions of each of the following parts of a neurone : (a) Dendron (b) Axon (c) Myelin Sheath (d) Schwann Cell (e) Node of Ranvier OR Write the functions of the following structural parts of a eukaryotic chromosome: (a) Centromere (b) Nucleolar Organizer (c) Chromatid (d) Telomere (e) Kinetochore

Draw a scientific diagram of a neurone and label the following parts — Axon Node of Ranvier Dendron Schwann Cell OR Draw a scientific diagram of the morphological structure of a eukaryotic chromosome and label the following parts — Chromatid Telomere Centromere Nucleolar Organizer

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