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TLS Online TPP Program

#Question id: 12491

Phenylketonuria shows autosomal recessive inheritance with an incidence of 1 in 10000. Assume that the population is in Hardy-Weinberg equilibrium. Which of the following is correct?

#Unit 8. Inheritance Biology
  1. The frequency of the mutant allele is 1 in 1000.
  2. The frequency of the normal (wild-type) allele is 49/50.
  3. The carrier frequency is 1 in 100.
  4. The carrier frequency is approximately 1 in 50.
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TLS Online TPP Program

#Question id: 3729

#Unit 3. Fundamental Processes

What is a Klenow fragment?
TLS Online TPP Program

#Question id: 32329

#Unit 1. Molecules and their Interaction Relevant to Biology

If Phosphocreatine forms ATP in a reaction as


The overall free energy change of the given reaction will be
TLS Online TPP Program

#Question id: 647

#Unit 1. Molecules and their Interaction Relevant to Biology

For the hypothetical reversible reaction where S is converted to P, the rate constant for the forward reaction is 105 s-1 while that of the backward reaction is 101 s-1. If the reaction is catalyzed by an enzyme, the rate constant for the forward reaction increases 100-fold. What will be the equilibrium constant of the enzyme catalyzed reaction?
TLS Online TPP Program

#Question id: 4033

#Unit 3. Fundamental Processes

Which of the following statements is false regarding the sigma-factor? 

A. It does not have a DNA-binding domain. 

B. Interaction with the core enzyme unmasks the DNA-binding region. 

C. Subregions 2.4 and 4.4 are involved in promoter recognition. 

D. It can also bind to the nontemplate strand. 
TLS Online TPP Program

#Question id: 5597

#Unit 5. Developmental Biology

Mammalian sperm will migrate against the direction of the flow—using CatSper calcium channels (like sea urchin sperm) to sense calcium influx and monitor the direction of the current, this process is known as: