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TLS Online TPP Program

#Question id: 4769

In some sheep, the presence of horns is produced by an autosomal allele that is dominant in males and recessive in females. A horned female is crossed with a hornless male. One of the resulting F1 females is crossed with a hornless male. What proportion of the male and female progeny from this cross will have horns?

#Applied Microbiology

  1. Half of the male progeny will be horned but none of the female progeny will be horned

  2. Half of the male progeny will be horned and half of the female progeny will be horned

  3. none of the male progeny will be horned but half of the female progeny will be horned

  4. All of the male progeny will be horned but none of the female progeny will be horned

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TLS Online TPP Program

#Question id: 38733

#Plant Biotechnology

Q. Concerning enzymatic isolation of protoplasts:
1. Cellulase hydrolyzes β-1,4-glycosidic bonds of cellulose.
2. Pectinase degrades the middle lamella.
3. Excessive enzyme exposure leads to osmotic bursting.
4. Enzyme treatment preserves plasmodesmata.
Which statements are correct?
TLS Online TPP Program

#Question id: 38734

#Plant Biotechnology

Q.  Regarding density gradient centrifugation used in protoplast purification:
1. Separation is based on buoyant density.
2. Viable protoplasts form a distinct band.
3. Broken cells sediment faster than intact protoplasts.
4. The method separates cells based on size alone.
Which statements are correct?
TLS Online TPP Program

#Question id: 38735

#Plant Biotechnology

Q. With reference to feeder layer technique in protoplast culture:
1. Feeder cells provide diffusible growth factors.
2. It compensates for the absence of cell-to-cell signaling.
3. Feeder cells directly fuse with protoplasts.
4. It increases plating efficiency of isolated protoplasts.
Which statements are correct?
TLS Online TPP Program

#Question id: 38736

#Plant Biotechnology

Q. Regarding callus formation from protoplasts:
1. Callus formation requires prior regeneration of the cell wall.
2. Callus cells are genetically identical to the donor plant.
3. Callus represents a dedifferentiated state.
4. High auxin concentration promotes callus induction.
Which statements are correct?
TLS Online TPP Program

#Question id: 38739

#Plant Biotechnology

Q. Which of the following pairs is INCORRECTLY matched?
TLS Online TPP Program

#Question id: 38740

#Plant Biotechnology

Q. Identify the correctly matched set used commonly for plant protoplast isolation: