Cell Structure ...

Which of the following is the stage of inactivation of cell cycle due to non-availability of mitogens and energy rich compounds?

Which of the following statements is/are false?

a. Generation time is the time interval between two cell cycles and varies from a few minutes to a few days.
b. Cyclin dependent protein kinases controls various phases of the cell cycle.

Mitosis is the most common method of division which brings about growth in multicellular organisms. Which of the following is/are the significance of mitosis?

Cell division is the process of formation of new or daughter cells from the pre-existing or parent cells. Which of the following factors control(s) cell division?

a. Cell size
b. Kernplasma ratio
c. Mitogens

G₂ Phase prepares the cell to undergo division. Which of the following is the characteristic of G₂ Phase?

Cell division occurs in three ways. Which of the following cell divisions is/are called direct cell division(s)?

a. Amitosis
b. Mitosis
c. Meiosis

Read the following statements and answer accordingly:

a. In anaphase, differentiation between cytoplasm and nucleoplasm disappears and endoplasmic reticulum and Golgi complex disorganised.
b. Mitosis is often named as somatic cell division as it occurs in the formation of somatic body cells.

Prophase is often studied in three substages. In which of the following stages, chromosomes shift towards the periphery so as to leave a clear central area?

a. Early prophase
b. Middle prophase
c. Late prophase

In which of the following stages of karyokinesis, the cytoplasmic viscosity decreases and two chromosome groups reorganise themselves into nuclei?

Plant cytokinesis is different from animal cytokinesis due to the presence of a solid cell wall on the outside. Which of the following is a characteristic of plant cytokinesis?

Which of the following statements about animal mitosis is false?

In which of the following stages of prophase I, nucleus enlarges but their ends remain attached to nuclear envelope through attachment plate?

Which of the following statements is/are false?

a. Mitotic division in which nuclear envelope degenerates during organisation of spindle is called eumitosis.
b. In the telophase, the spindle fibres disappear around the poles and Golgi complex and endoplasmic recticulum are reformed.

In which of the following stages of Meiosis I, the polar groups of chromosomes arrange themselves into haploid or dyad nuclei and elongate?

Meiosis II is divided into four phases. The centromere of each chromosome divides into two so that there is one centromere for each chromatid in