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TLS Online TPP Program

#Question id: 10191

Statements are given as
A. Primary kinetic isotope effects are rate changes due to isotopic substitution at a site of bond breaking in the rate determining step of a reaction.
B. Solvent shows primary kinetic isotope effect
C. Secondary kinetic isotope effects are rate changes due to isotopic substitutions at a site other than the bond breaking site in the rate determining step of the reaction.
D. Solvent shows primary kinetic isotope effect and secondary kinetic effect as well
Which of the following is correct combination of statements

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. A & B
  2. A & C
  3. B & D
  4. A, B & C
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TLS Online TPP Program

#Question id: 12698

#Unit 7. System Physiology – Animal

The following test results were obtained: urine flow rate = 2.0 ml/min; urine inulin concentration = 60 mg/ml; plasma inulin concentration = 2 mg/ml; urine potassium concentration = 20 μmol/ml; plasma potassium concentration = 4.0 μmol/ml; urine osmolarity = 150 mOsm/L; and plasma osmolarity = 300 mOsm/L. What is the net potassium reabsorption rate?
TLS Online TPP Program

#Question id: 7003

#Unit 5. Developmental Biology

What structural adaptation in chickens allows them to lay their eggs in arid environments rather than in water?
TLS Online TPP Program

#Question id: 4889

#Unit 8. Inheritance Biology

A three point test cross was carried out in Drosophila melanogaster involving three adjacent incomplete link genes A, C and B arranged in the same order. The distance between A to C is 20 map units (mu) and that between B to C is 10 map. If pure line Drosophila AAbbCC crosses with aaBBcc to produce F1 offspring were allowed to cross with aabbcc result in 1000 offspring, which of the following genotype combination with number is correct?

Genotype

Number

I- Aabbcc

a- 90

II- aabbCc

b-40

III- AaBbCc

c-10

TLS Online TPP Program

#Question id: 22948

#Unit 5. Developmental Biology

In the floral meristem, the FT-FD complex → SOC1 and AP1 → ____?___ gene expression
TLS Online TPP Program

#Question id: 2533

#Unit 2. Cellular Organization

Cellulose microfibrils have an ordered structure and are synthesized at the plasma membrane, given characteristics of microfibrils;

a) Each microfibril is composed of an estimated 18 parallel chains of (1,4)-linked β-D-glucose chains tightly bonded to each other to form a crystalline microfibril

b) Microfibrils have hydrophilic surfaces, populated by polar –OH groups extending from theplane of the sugar rings

c) Microfibrils have hydrophobic surfaces, populated by nonpolar C–H groups populating thesides of stacked glucose chains

 d) microfibril important for enzymatic attack by microbial cellulases, which dock onto the hydrophobic surface and remove one glucan chain at a time

Which of the following from given characterstics of microfibrils is incorrect?