Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 52014
TLS Online TPP Program

#Question id: 2615

What are the effects shown in trp operon if we fused regulatory region of lac with structural genes of trp; which one is incorrect,

#SCPH01 Biochemistry

  1. Lactose high- block trp synthesis

  2. Lactose & glucose both are available- Basal level

  3. Lactose +, Glucose -, activated level

  4. Lactose-, Glucose+, leaky

More Questions
TLS Online TPP Program

#Question id: 3633

#SCPH12 I Genetics

In a maternity ward, four babies become accidentally mixed up. The ABO types of the three babies are known to be A, B, and AB. The ABO types of the four sets of parents that are clamed are determined.

(A) AB X O  (B) A X O, (C) A X AB, (D) B  X O.

Following some statement is given

A. A blood group baby must be child of Parent B

B. B blood group baby must be child of Parent A

C. AB blood group baby must be child of Parent A

D. AB blood group baby must be child of Parent C

Which of the following above statement is correct?
TLS Online TPP Program

#Question id: 3889

#SCPH06 I Botany

The operator region normally can be bound by:
TLS Online TPP Program

#Question id: 1095

#SCPH28 | Zoology

What does it mean to say that a signal is transduced?
TLS Online TPP Program

#Question id: 15637

#SCPH01 Biochemistry

You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.
     
Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.
TLS Online TPP Program

#Question id: 4123

#SCPH01 Biochemistry

A certain bacterial mRNA is known to represent only one gene and to contain about 800 nucleotides.  If you assume that the average amino acid residue contributes 110 to the peptide molecular weight, the largest polypeptide that this mRNA could code for would have a molecular weight of about: