Genes that control coat color in mammals represent some of the best early examples of genes with multiple alleles exhibiting different phenotypes. A classic example is the C gene in hamsters. Three of the known alleles of this gene are C, c^a and c^k. Each supplies a different amount of black pigment to the coat hair. The phenotypes of three different homozygous strains are as follows.

Based on the concepts of recessivity, determine whether ck and ca were dominant or recessive alleles by crossing the true-breeding albino hamsters  with the true-breeding sepia hamsters. From the resulting F1 progeny phenotype, what would be the ratio of F2 phenotype

#Question id: 10168

#Unit 6. System Physiology – Plant

Mesophyll cells of NADP–ME type C4 photosynthesis use four transport steps across the chloroplast envelope to fix one molecule of atmospheric CO2 

a.) import of cytosolic pyruvate through unknown transporter    

b.) import of cytosolic oxaloacetate through dicarboxylate transporter

c.) Import of stromal phosphoenolpyruvate through unknown transporter

d.) export of stromal malate through dicarboxylate transportere.) export of stromal phosphoenolpyruvate through phosphoenolpyruvate phosphate translocator

f.) export of cytosolic oxaloacetate through dicarboxylate transporter         

Find the correct four transporter from the given statements

#Question id: 10169

#Unit 6. System Physiology – Plant

Which of the following is not the effect of C3 and C4 cycle in hot and dry climates ?

#Question id: 10170

#Unit 6. System Physiology – Plant

Which of the following given facts regarding CAM Plants are TRUE?

a.) The leaves of CAM plants have traits that minimize water loss, such as thick cuticles, large vacuoles, and stomata with small apertures

b.) All CAM plants, the initial capture of CO2 into four-carbon acids takes place at night, and the posterior incorporation of CO2 into carbon skeletons occurs during the day

c.) The CO2 taken up during the night is fixed into malate

d.) Tight packing of the mesophyll cells enhances CAM performance by restricting CO2 loss during the day

#Question id: 10171

#Unit 6. System Physiology – Plant

Quantum flux, or photon flux density (PFD), is the number of incident quanta (singular quantum) striking the leaf, expressed in

#Question id: 10172

#Unit 6. System Physiology – Plant

leaves continuously adjust the orientation of their laminae such that they remain perpendicular to the sun’s ray and maximize light absorption by

#Question id: 10173

#Unit 6. System Physiology – Plant

 Some solar-tracking plants can also move their leaves so that they avoid full exposure to sunlight, thus minimizing heating and water loss. These sun-avoiding leaves are called