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TLS Online TPP Program

#Question id: 42

What is the relation between the given compound?

#SCPH28 | Zoology

  1. constitutional isomers

  2. enantiomers

  3. diastereomers

  4. identical

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TLS Online TPP Program

#Question id: 10283

#SCPH05 I Biotechnology

How to Phosphofructokinase-1 (PFK-1) and Fructose 1,6-Bisphosphatase are reciprocally regulated ?

a) ATP inhibits PFK-1 by binding to an allosteric site and lowering the affinity of the enzyme for its substrate fructose 6-phosphate

b) citrate is also an allosteric regulator of PFK-1, high citrate concentration increases the inhibitory effect of ATP

c) FBPase-1, is strongly inhibited (allosterically) by AMP; when the cell’s supply of ATP is low (corresponding to high AMP), the ATP-requiring synthesis of glucose slows

d) AMP inhibits PFK-1 by binding to an allosteric site and lowering the affinity of the enzyme for its substrate fructose 6-phosphate

Which of the following statements of regulation of enzyme is correct?
TLS Online TPP Program

#Question id: 6948

#SCPH28 | Zoology

Which of the following genes is expressed at the posterior margin of each parasegment
TLS Online TPP Program

#Question id: 5224

#SCPH28 | Zoology

What does the field often called ʺevo-devoʺ study?
TLS Online TPP Program

#Question id: 9180

#SCPH28 | Zoology

Which of the following statements can be accurately made about light in aquatic environments?
TLS Online TPP Program

#Question id: 15150

#SCPH12 I Genetics

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.
Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in series with recessive mutations in both genes, the F1 progeny shows will have red eye, what is the expected phenotypic ratio of red to white eyed insects in the F2.