TLS Online TPP Program

#Question id: 2678


Insertional inactivation of the lacZ gene on a plasmid can be used to screen for recombinants on a plate containing:

#SCPH06 I Botany
  1. Tetracycline and ampicillin

  2. Tetracycline only

  3. IPTG and X-gal

  4. IPTG only

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TLS Online TPP Program

#Question id: 850

#SCPH06 I Botany

The experimental inverse of protein structure prediction, has provided insights into protein folding and stability. Protein design attempts to construct an amino acid sequence that will form a structure such as a sandwich of β sheets or a bundle of α helices;

TLS Online TPP Program

#Question id: 4743

#SCPH06 I Botany

Ectrodactyly is an autosomal dominant trait that causes missing middle fingers (lobster claw malformation). A grandfather and grandson both have ectrodactyly, but the intervening father has normal hands by x-ray. Which of the following terms applies to this family?

TLS Online TPP Program

#Question id: 447

#SCPH06 I Botany

In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change (DG'°) of 23.8 kJ/mol.  Under what conditions encountered in a normal cell will the free-energy change (DG) be negative, enabling the reaction to proceed spontaneously to the right?

TLS Online TPP Program

#Question id: 3435

#SCPH06 I Botany

You turn on a light and observe cockroaches scurrying to dark hiding places. What have you observed?

TLS Online TPP Program

#Question id: 556

#I Life Science/ Life Sciences Group – I-V

Which of the following statement is correct to calculate the turnover number of an enzyme,

A) the enzyme concentration.

B) the initial velocity of the catalyzed reaction at [S] >> Km.

C) the initial velocity of the catalyzed reaction at low [S].

D) the Km for the substrate.