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TLS Online TPP Program

#Question id: 13107

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction on chromosome 15 and load each one into a separate well of an agarose gel, and then run the gel.
 

 
Why is it that some people show two bands?

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology
  1. The more repeats you have, the longer your DNA fragment is, and longer DNA fragments migrate more slowly in gels.
  2. They are homozygotes for the allele that cannot be cut.
  3. They are homozygotes for the allele that can be cut.
  4. They are heterozygotes, and possess one allele that can be cut and one allele that cannot be cut.
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TLS Online TPP Program

#Question id: 638

#Section 2: General Biology

Match the following class of enzymes with them

Enzyme

Class of enzyme

A. Hexokinase

1

B. Phosphoglucoisomerase

2

C. Glyceraldehyde 3-phosphate dehydrogenase

3

D. Phosphoglycerate mutase

4

E. Enolase

5

F. Aldolase

TLS Online TPP Program

#Question id: 639

#Section 2: General Biology

Match the coenzymes in column I enzymes to class of enzymes in column II

A. Phosphofructokinase

1. Redox reaction

B. Enolase

2. Phosphoryl shift

C. Phosphoglycerate mutase

3. Dehydration

D. Glyceraldehyde 3 Phosphate dehydrogenase

4. Phosphoryl transfer

TLS Online TPP Program

#Question id: 640

#Section 2: General Biology

The data in the table above were collected for an enzyme-catalyzed reaction. The Km for this enzyme is approximately
TLS Online TPP Program

#Question id: 641

#Section 2: General Biology

Which of the following does NOT describe a mechanism that cells use to regulate enzyme activities?

A. Cells control enzyme activity by phosphorylation and dephosphorylation.

B. Cells control enzyme activity by the binding of small molecules.

C. Cells control the rates of diffusion of substrates to enzymes.

D. Cells control the rates of enzyme degradation.

E. Cells control the rates of enzyme synthesis.

F. Cells control the targeting of enzymes to specific organelles. 
TLS Online TPP Program

#Question id: 642

#Section 2: General Biology

The graphs P, Q and R show the variation of rate constant (k) with temperature. The reactions represented by P, Q and R, respectively, are
TLS Online TPP Program

#Question id: 644

#Section 2: General Biology

Enzyme X and Enzyme Y are both involved in monosaccharide metabolism. Enzyme X uses glucose as a substrate while Enzyme Y uses fructose as a substrate. At pH=7.0, Enzyme X has a Vmax of 10 μM/s while Enzyme Y has a Vmax of 20 μM/s. Both enzymes have a Km of 3.0 mM for their respective substrates. Which aspects of its reaction will be changed by Enzyme Y?