You are interested in a new type of autosomal dominant mutation that gives purple eyes in Drosophila. You have a true-breeding purple-eyed line carrying a mutation that you call pr-1. You have isolated a second purple-eyed mutation that you call pr-2, which you have established in a true-breeding line that also carries a recessive marker st, which gives stubby legs. You cross a fly from the pr-1 line to a fly from the st, pr-2 line producing F1 females which you then cross to males from a true breeding st line (normal eyes). From this cross, 1000 progeny flies can be categorized into four different phenotypic classes:

                   

What is the phenotype of a pr-1 pr-2 double mutant?

TLS Online TPP Program

#Question id: 20259

#Unit 12. Applied Biology

Under stress condition expression of E, coli gene mtl 1D in plants leads to 

1. Mannitol accumulation 

2. Enhanced growth 

3. Reduced growth

4. Glucose accumulation 

Which of the following is correct option?

TLS Online TPP Program

#Question id: 20260

#Unit 12. Applied Biology

The modified forms of starch have varied applications in food and other industries. Basic strategies to modify starch quality are 

(i) genetic modification of crops (by breeding or biotechnology)

(ii) food processing (using enzymes and chemicals)

(iii) food supplementation (modification of starch by employing microorganisms)

Which of the following strategies are correct?

TLS Online TPP Program

#Question id: 20261

#Unit 12. Applied Biology

Certain modified forms of starch such as high amylose starch are widely used in 

1. Snack products

2. Improve uniformity, stability and texture

3. Thickener

Which of the following are correct?

TLS Online TPP Program

#Question id: 20262

#Unit 12. Applied Biology

Certain modified forms of starch such as high amylopectin starch are widely used in 

1. Snack products

2. Improve uniformity, stability and texture

3. Thickener

4. Paper industry

Which of the following is correct option?

TLS Online TPP Program

#Question id: 20263

#Unit 12. Applied Biology

_______  an excellent alternative to polystyrene-based packing material

TLS Online TPP Program

#Question id: 20264

#Unit 12. Applied Biology

______________ is the main enzyme of amylose biosynthesis. Whose increased activity is expected to increase the amylose content of starch?