STD 11 - 10. Cell cycle and cell division — NEET STD 11 Science — Question

Which of the following statements is true regarding cell cycle ?
(i) Cell growth (in terms of cytoplasmic increase) is a continuous process.
(ii) DNA synthesis occurs only during one specific stage in the cell cycle.
(ii) The replicated chromosomes (DNA) are distributed to daughter nuclei.
(iv) Human cells divide once in approximately every 90 minutes.
(v) Duration of cell cycle can vary from organism to organism and also from cell type to cell type.
(vi) Cell cycle in yeast completed in about 24 hours.

Chlorophyll containing fleshy cylindrical structures found in Euphorbia are modified

Which of the following pyramid is always upright and can never be inverted?

Which of the following statements are incorrect for aerobic respiration ?
(i) It is most common in higher organisms.
(ii) It take place within the mitochondria
(iii) The complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of CO₂ takes place in the matrix of the mitochondria.
(iv) The passing on of the electrons removed as part of the hydrogen atoms to molecular CO₂
(v) Synthesis of ATP takes place in the inner membrane of the mitochondria.
(vi) Pyruvate after enters mitochondrial matrix undergoes oxidative decarboxylation by a complex set of reactions catalysed by pyruvic dehydrogenase.
(vii) The reactions catalysed by pyruvic dehydrogenase require the participation of several coenzymes, including FADH⁺ and coenzyme A.

It takes very long time for pineapple plants to produce flowers. Which combination of hormones
can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

Tropic movement is due to

The rate of growth of any organism follows

Root hairs are found