TLS Online TPP Program

#Question id: 4336


Which of the following processes would result from a mutation that deactivates a regulatory gene of a repressible operon in an E. coli cell?

#SCPH06 I Botany
  1. continuous transcription of the structural gene controlled by that regulator

  2. complete inhibition of transcription of the structural gene controlled by that regulator

  3. irreversible binding of the repressor to the operator

  4. continuous translation of the mRNA because of alteration of its structure

More Questions
TLS Online TPP Program

#Question id: 1270

#SCPH06 I Botany

Which of the following is a major extracellular molecule in mammals containing no protein portion?

TLS Online TPP Program

#Question id: 666

#SCPH01 Biochemistry

Nearly all peptide bonds are in the trans configuration because

TLS Online TPP Program

#Question id: 5714

#SCPH28 | Zoology

Homologous chromosomes pair in prophase I as a following way, if crossing over occur between P and Q gene of homologous chromosome?

Which of the following consequence of above abnormality?

A. Dicentric chromosome visible at anaphase I

B. Results in formation of acentric chromatid

C. Recombinant gamete unable to produced viable progeny due to missing of many gene

D. Resulting recombinant gamete become aneuploid 

TLS Online TPP Program

#Question id: 7309

#SCPH06 I Botany

Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.

A. In Arabidopsis under short days, there is little overlap between CO mRNA expression and daylight.

B. CO protein does not accumulate to sufficient levels in the phloem to promote the expression of the transmissible floral stimulus and the plant remains vegetative.

C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.

D. CO activates FLC mRNA expression in the phloem, which causes flowering when the FT protein is translocated to the apical meristem.

Which of the following is incorrect?

TLS Online TPP Program

#Question id: 4316

#SCPH28 | Zoology

Which of the following processes do normal proto-oncogenes typically exhibit?