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#Question id: 4373


Which of the following is true about transcription?

#SCPH28 | Zoology
  1. A repressor protein activates transcription of a negatively regulated gene.

  2. A positively regulated gene can be transcribed only in the absence of active repressor.

  3. In the absence of an activator, a negatively regulated gene is poorly transcribed.

  4. The initiation of transcription of regulated genes is controlled by regulatory proteins which bind to specific DNA sequences.

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TLS Online TPP Program

#Question id: 3519

#SCPH01 Biochemistry

If quadruple heterozygote of genotype Aa Bb Cc Dd is self-fertilized, what is the probability of a quadruple heterozygote Aa Bb Cc Dd offspring is assuming independent assortment of all four pairs of alleles.

TLS Online TPP Program

#Question id: 914

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

Lipoprotein lipase acts in:

TLS Online TPP Program

#Question id: 3556

#SCPH12 I Genetics

Flower color in plant follows incomplete dominance. Cross between AA and aa results all F1 offspring are uniform were allowed to cross with AA genotype. What will be phenotype ratio?

TLS Online TPP Program

#Question id: 9584

#SCPH06 I Botany

In given Relationship of oxygen production to flash energy, the first evidence for the interaction between the antenna pigments and the reaction centre, What conclusion can be drawn about based on graph;


a.) several hundred pigments are associated with each reaction centre and that each reaction centre must operate four times to produce 1 molecule of oxygen—hence the value of 2500 chlorophylls per O2

b.) low light intensity of the curve, an increase in the number of photons stimulates a proportional increase in oxygen evolution. Thus, the slope of the curve measures the quantum yield for oxygen production

c.) The quantum yield for a particular process can range from 0 →if that process does not respond to light to 1.0→if every photon absorbed contributes to the process by forming a product

d.) O2 require more than a single photochemical event to be formed, and therefore have a lower quantum yield of formation than the photochemical quantum yield. It takes about ten photons to produce one molecule of O2, so the quantum yield of O2 production is about 0.1

Which of the following statements would be correct relates with graph?

TLS Online TPP Program

#Question id: 3611

#SCPH12 I Genetics

ABO blood group system is due to