During the cell cycle, DNA content is doubled in the
G1 phase
S phase
G2 phase
end of M phase
B.
S phase
Cell cycle is a series of cyclic changes through which a cell passes during its growth and division. In the cell cycle, the resting stage or interphase can be divided into three periods.
G1 phase: RNA and Protein synthesised
S phase: DNA is formed from purines and pyrimidines. The DNA content of nucleus would be doubled.
G2 phase: Synthesis of RNA and protein continues, but DNA synthesis stops.
Which of these are considered most essential in the origin of life?
Enzymes
Nucleic acids
Carbohydrates
Proteins
If a stimulus, several times greater than the threshold stimulus is provided to a muscle fibre, it will
contract with a larger force
contract with a smaller force
contract with the same force
undergo tetany.
The respiratory centre in the brain is stimulated by
CO2 concentration in venous blood
O2 concentration in artery blood
CO2 concentration in artery blood
O2 concentration in venous blood
Which floral family has (9) + 1 arrangement or anthers in the androecium ?
Malvaceae
Rutaceae
Fabaceae
Caesalpinaceae
Barr body is found in the cytoplasm during
interphase in cell of female mammal
interphase in cell of male mammal
prophase in cell of female mammal
prophase in cell of male mammal
Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of
imbibition
endosmosis
capillarity
deplasmolysis
