121.

The organelle of C3 plants, where glyoxylate is formed is

• Chloroplast

• Peroxisome

• Mitochondria

• Cytosol

Which statement is correct in relation of activity of telomerase?

• Increase with age     

• Observed in all cancers and responsible for immortality   

• Responsible for apoptosis but not for ageing       

• Re-synthesize telomeres    

In an organism if number of linkage group is 12 then, number of haploid set of chromosome is

• 12

• 6

• 24

• 4

Chromophore associated with phytochrome of plants is

• Phycobilin

• Beta-carotene  

• Pterin

• Flavin adenine dinucleotide    

During the early origin of earth oxygen was absent in environment. Later on the oxygen increases and reached to present level. The main source of oxygen was

• Photosynthesis

• Released from CaCO₃    

• Escape of CO₂ to environment    

• Escape of oxygen from internal sources   

Which of the following is produced in phenyl propanoid pathway?

• Phenolics

• Carotenes

• Alkaloids

• Terpenes

Which of the following helps in osmoprotection in plants?

• Proline

• Tryptophan

• Glycine

• Levulinic acid

Frog A has length ‘l’ and weight ‘w’. Another frog ‘B’ has double length and four times weight. It means

• Frog A is more cylindrical   

• Frog B is more cylindrical   

• Frog A has low surface to volume ratio 

• Frog B is overweight  

In a certain genetic cross, 1/ 16 proportion of progeny shows mutant phenotype. It means

• Two independent assorting genes are involved for trait

• Two independently assorting duplicate genes are involved

• Two linked genes are involved for trait

• Two independent segregating alleles areresponsible for trait

Which statement is correct for membrane receptors for signal transduction?

• Contain single or multiple membranes spanning domain   

• Always coupled with trimeric G protein      

• Always results in production of secondary messenger  

• Recognized non-polar signaling molecules