TLS Online TPP Program

#Question id: 378


Which of the following statements about buffers is true?

#SCPH05 I Biotechnology
  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: 10549

#I Life Science/ Life Sciences Group – I-V

Following are the list of some of the molecular “danger signals” (column I) and its characteristics (column II)                                                                                         

 Column I                                                                                   Column II

 a) MAMPs                               i) produce from the pathogen molecules support their ability to successfully colonize their host and gain nutritional benefits

b) DAMPs                               ii) A plant response to insect herbivores involve both a wound response and the recognition of certain compounds abundant in the insect’s saliva or regurgitant

c) Effectors                             iii) are conserved among a specific class of microorganisms such as chitin for fungi, flagella for bacteria

d) Elicitor                                iv) molecules secrete from the damaging plant by herbivory such as Prosystemin

Which of the following is the correct match between the signals and their respective mechanism?

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#Question id: 15181

#SCPH01 Biochemistry

In which kind of electrophoresis, analyte can move in either direction?
1. Gel Electrophoresis
2. PAGE
3. Free Solution
4. Capillary

TLS Online TPP Program

#Question id: 2334

#SCPH28 | Zoology

Membrane proteins

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#Question id: 5323

#SCPH06 I Botany

An X-linked recessive gene produces red-green color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the probability that their son will be color-blind?

TLS Online TPP Program

#Question id: 1738

#SCPH05 I Biotechnology

T-cell help for antibody production: