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TLS Online TPP Program

#Question id: 678

Which is not true about β-sheets?

#SCPH01 Biochemistry

  1. The side-chains of all amino acids point to the same side of the sheet.

  2. The polypeptide chains in the sheet are nearly fully extended.

  3. The range of allowed phi and psi angles is broader than for those in the α-helix.

  4. In antiparallel sheets the hydrogen bonds between adjacent strands are nearly perpendicular to the backbones of the strands.

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TLS Online TPP Program

#Question id: 10809

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

Sieve element sap is rich in sugars and other organic molecules, These molecules represent an energy investment for the plant. How their loss be prevented when sieve elements are damaged?
TLS Online TPP Program

#Question id: 22956

#SCPH01 Biochemistry

Individual and overlapping expression of homeotic genes in adjacent whorl of a flower determine the pattern of floral organ development. In an Arabidopsis mutant, floral organs are distributed as follows
WHORL 1 Sepal
WHORL 2 Petal
WHORL 3 Petal
WHORL 4 Sepal
Loss of function mutation in which one of the following genes would have caused the above pattern of floral organs development 
TLS Online TPP Program

#Question id: 3439

#SCPH28 | Zoology

Male insects attempt to mate with orchids but eventually stop responding to them. What term best applies to this behavior?
TLS Online TPP Program

#Question id: 7297

#SCPH01 Biochemistry

How is the ABC model for floral identity in Arabidopsis similar to the models for homeotic gene function derived from studies in Drosophila?
TLS Online TPP Program

#Question id: 23250

#SCPH06 I Botany

In presence of ATP luciferase-mediated conversion of luciferin into which compound?