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TLS Online TPP Program

#Question id: 9157

At 15-30°N, air masses formed over the Pacific Ocean are moved by prevailing westerlies, where they encounter extensive north-south mountain ranges. Which statement best describes the outcome of this encounter between a landform and an air mass?

#Unit 9. Diversity of Life Forms
  1. The cool, moist Pacific air heats as it rises, releasing its precipitation as it passes the tops of the mountains. This now warm and dry air cools as it descends on the leeward side of the range.
  2. The warm, moist Pacific air rises and cools, releasing precipitation as it moves up the windward side of the range. This now cool and dry air mass heats up as it descends on the leeward side of the range.

  3. The cool, dry Pacific air heats up and picks up moisture from evaporation of the snowcapped peaks of the mountain range, releasing this moisture as precipitation when the air cools while descending on the leeward side of the range.

  4. These air masses are blocked by the mountain ranges, producing high annual amounts of precipitation on the windward sides of these mountain ranges
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TLS Online TPP Program

#Question id: 5281

#Unit 8. Inheritance Biology

In the mating Hfr Strs met+ his+ leu+ trp+ Ala+   X F- Strres met- his- leu- trp- Ala-. At regular interval time, the mating cells are interrupted and the cell suspensions plated on four different growth media with streptomycin. The amino acids in the growth media and the number of colonies observed on each are as follows:

Interrupted time

Composition of media

Growth

His

Leu

Ala

Trp

Met

2   min

+

-

+

+

+

Yes

10 min

+

-

-

+

+

Yes

12 min

+

-

-

+

-

No

15 min

+

-

-

-

+

Yes

20 min

-

-

-

-

+

Yes

What is the order of transfer of the genes?
TLS Online TPP Program

#Question id: 5280

#Unit 8. Inheritance Biology

In the mating Hfr met- his+ leu+ trp+ × F- met+ his- leu- trp-.  The met marker is known to be transferred very late. After a short time, the mating cells are interrupted and the cell suspensions plated on four different growth media. The amino acids in the growth media and the number of colonies observed on each are as follows:

histidine + tryptophan  250 colonies

histidine + leucine         50 colonies 

leucine + tryptophan    500 colonies

histidine                       10 colonies

What is the order of transfer of the genes
TLS Online TPP Program

#Question id: 5279

#Unit 8. Inheritance Biology

In a transduction experiment, phage P1 is grown on a bacterial host of genotype A+ B+ C+ and the resulting lysate is used to infect a recipient strain of genotype A– B– C–. The genes are in an order such that B is in the middle, and the distance between A and B is greater than the distance between B and C. Based on this information, which of the following least genotype?
TLS Online TPP Program

#Question id: 5278

#Unit 8. Inheritance Biology

What is the co-transduction frequency for the A and B genes, from the following dataset?(Assume that there has been selection for the A+ form of the A gene). Genotype                                Number

 A+B+C+                                   10

 A+B+C-                                    30

A+B-C+                                     20

 A+B-C-                                     40
TLS Online TPP Program

#Question id: 5277

#Unit 8. Inheritance Biology

Deduce the genotype of bacteria strain was shown either growth presents or not in different media?

Media supplement

Minimal

Minimal + Arginine

Minimal + Methionine

Minimal + Arginine+ Methionine

Growth

No

Yes

     No

Yes

TLS Online TPP Program

#Question id: 5276

#Unit 8. Inheritance Biology

Donor Strain ABCDE transformation to   recipient strain abcde. Co-transformation check by using media with different supplement?

Media supplement

Growth

A

B

C

D

E

Yes

-

+

-

+

+

Yes

+

+

-

-

+

Yes

+

-

+

-

+

Yes

+

-

+

+

-

Yes

What is a order of gene ?