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TLS Online TPP Program

#Question id: 378

Which of the following statements about buffers is true?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. A buffer composed of a weak acid of pKa = 5 is stronger at pH 4 than at pH 6.

  2. At pH values higher than the pKa, the salt concentration is higher than that of the acid.

  3. The strongest buffers are those composed of strong acids and strong bases.

  4. When pH = pKa, the weak acid and salt concentrations in a buffer are equal.

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TLS Online TPP Program

#Question id: 23778

#Unit 7. System Physiology – Animal

Neurotransmitter release from the rods of retina- 
TLS Online TPP Program

#Question id: 5464

#Unit 8. Inheritance Biology

Two varieties of maize averaging AABBCC (200 inch) and aabbcc (80 inch) in height, respectively, are crossed. The F1 progeny is quite uniform averaging 140 inches in height allowed to self fertilization. If height is control by 3 pair of polygene, what is the height of following genotype of F2 plant?

I- AaBBCC     II- aaBbCC       III- aabbCc
TLS Online TPP Program

#Question id: 12103

#Unit 10. Ecological Principles

Which of the following is a good description of an ecological niche? 
TLS Online TPP Program

#Question id: 10360

#Unit 6. System Physiology – Plant

How much ATP require in the nitrogen fixation or conversion of ammonium assimilation in the system?
TLS Online TPP Program

#Question id: 10253

#Unit 6. System Physiology – Plant

Two pathways for the splitting of sucrose are known in plants, both of which take part in the use of sucrose from phloem unloading;