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TLS Online TPP Program

#Question id: 33462

What is order of relative solubilities in water (most soluble to least soluble) of Deoxyribose, Guanine, Phosphate

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. Deoxyribose, Guanine, Phosphate
  2. Guanine, Phosphate, Deoxyribose
  3. Phosphate, Deoxyribose, Guanine
  4. Guanine, Deoxyribose, Phosphate
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TLS Online TPP Program

#Question id: 139

#Unit 1. Molecules and their Interaction Relevant to Biology

 A sequence of amino acids with a relatively high hydropathy is very likely to function by
TLS Online TPP Program

#Question id: 15655

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. Next you isolate a mutation, designated MelB–, which gives uninducible melibiase activity. Mapping experiments show that MelB– is linked to Mel1. Using an F' factor that carries the chromosomal region surrounding Mel1, you perform the following genetic tests:

 
Describe the proposal for the type of regulatory functions affected by the MelB– mutation.
TLS Online TPP Program

#Question id: 11834

#Unit 6. System Physiology – Plant

Hook formation and maintenance result from ethylene-induced asymmetric growth,  indicating that phytochrome is the photoreceptor involved in this process

a) Red light induces hook folding, and far-red light reverses the effect of red

b) close interaction between phytochrome and ethylene controls hook opening

c) Red light inhibits ethylene formation, promoting growth on the inner side, thereby causing the hook to open

Which of the following combination from the given statements is correct?
TLS Online TPP Program

#Question id: 12360

#Unit 10. Ecological Principles

Which of the following is not a method of estimating the size of a population?
TLS Online TPP Program

#Question id: 7167

#Unit 5. Developmental Biology

The following experiment is designed to study the role of several hormones in the regulation of metamorphosis in frogs.

Group #

Treatment

Days to Metamorphosis

1

Saline

30

2

Prolactin

> 100

3

TSH

15

4

Thyroxine

10

5

Corticosterone

30

6

Thyroxine + Corticosterone

5

7

Prolactin + TSH

30

8

Thyroid gland removed

> 100

These results suggest which of the following about prolactin (group 2 and group 7) at the dose tested?