During gamete formation, the enzyme recombinase participates during
metaphase - I
anaphase-II
prophase-I
prophase-I
C.
prophase-I
The pachytene stage of prophase I of meiosis I is characterized by the appearance of recombination nodules, the sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes. Crossing over is the exchange of genetic material between two homologous chromosomes. It is also an enzyme-mediated process and the enzyme involved is called recombinase.
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
Hypothalamus activates the parasympathetic division of brain
Hypothalamus activates the parasympathetic division of brain
The correct sequence of cell organelles during photorespiration is
chloroplast - Golgi bodies - mitochondria
chloroplast-rough endoplasmic reticulum -dictyosomes
chloroplast-mitochondria-peroxisome
chloroplast-mitochondria-peroxisome
Which one of the following is correctly matched?
Passive transport of nutrients - ATP
Apoplast - Plasmodesmata
Potassium-Readily mobilization
Potassium-Readily immobilization
Which one of the following is a correct statements?
Pteridophyte gametophyte has a protonemal and leafy stage
In gymnosperms female gametophyte is free-living
Antheridiophores and archegoniophores are present in pteridophytes
Antheridiophores and archegoniophores are present in pteridophytes
Which one of the following does not differ in E.coli and Chlamydomonas?
Ribosomes
Chromosomal organisation
Cell wall
Cell wall
