In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

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#Question id: 12391

#Unit 6. System Physiology – Plant

Which of the following processed are involve in cell enlargement in plant?

a) Osmotic uptake of water across the plasma membrane is driven by the gradient in water potential (∆Yw)

b) Turgor pressure builds up because of the rigidity of the cell wall

c) Biochemical wall loosening occurs, allowing the cell to expand in response to turgor pressure

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#Question id: 12392

#Unit 6. System Physiology – Plant

 According to the acid growth hypothesis, the source of the hydrogen ions is the plasma membrane H+-ATPase, whose activity is thought to increase in response to

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#Question id: 12393

#Unit 6. System Physiology – Plant

According to the widely accepted acid growth hypothesis, allows some main predictions except;

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#Question id: 12394

#Unit 6. System Physiology – Plant

 Which one of the following fungal phytotoxin, stimulates both rapid proton extrusion and transient growth in stem and coleoptile sections?

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#Question id: 12395

#Unit 6. System Physiology – Plant

In theory, auxin could increase the rate of proton extrusion by two possible mechanisms:

I) H+-ATPase activation

II) H+-ATPase synthesis

a) Auxin involves in the activation of ATP-driven proton-pump (H+-ATPase) indirectly

b) ABPs appear to be able to activate the plasma membrane H+-ATPase in the presence of auxin

c) Activity of the H+- ATPase is repressed by the C-terminal domain of the enzyme, which can block the catalytic site  in absence of auxin

d) The protein is synthesized on the rough endoplasmic reticulum and targeted via the secretory pathway to the plasma membrane

Find out the correct explanation of given mechanisms.

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#Question id: 12396

#Unit 6. System Physiology – Plant

Which compound  are included in the buffer washout solution, that involved in prevent normal relocalization of PIN to the plasma membrane ?