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TLS Online TPP Program

#Question id: 4350

Portions of the DNA sequences of normal and mutant b-globin genes are shown. The most plausible explanation for why the indicated mutation (changing an A to a G) results in the disease b-thalassemia is that the mutation

#Unit 3. Fundamental Processes

  1. changes the amino acid specified by the codon of which the altered base is part

  2. generates a recognition site for a restriction enzyme, so the gene is cut in two

  3. creates a new splice site, so that a portion of the intron is not removed

  4. results in an increase in the transcription of the b-globin gene

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TLS Online TPP Program

#Question id: 28985

#Unit 7. System Physiology – Animal

Norepinephrine is formed by which of the following process?
I- hydroxylation followed by decarboxylation of tyrosine
II- by conversion of dopamine in presence of dopamine β -hydroxylase enzyme
TLS Online TPP Program

#Question id: 3567

#Unit 8. Inheritance Biology

Cross is made between a pure breeding plant having red coloured flowers with a pure breeding plant having white coloured flowers. All of these offspring are red colored flower. Upon selfing of these F1 red flower plant produced both red and white flower. Which of the following is not a conclusion of these cross?
TLS Online TPP Program

#Question id: 28578

#Unit 5. Developmental Biology

Sox9 and Sry also act to block the ovary-forming pathway, by  blocking__
TLS Online TPP Program

#Question id: 19383

#Unit 12. Applied Biology

Mutant EPSPS can be used to produce
TLS Online TPP Program

#Question id: 5704

#Unit 8. Inheritance Biology

What kind of pairing configuration would be seen in prophase of meiosis I in (a) an inversion homozygous, (b) a translocation heterozygote?