TLS Online TPP Program

#Question id: 549


Which one of the following statements is true of enzyme catalysts?

#SCPH06 I Botany
  1. They bind to substrates, but are never covalently attached to substrate or product.

  2. They increase the equilibrium constant for a reaction, thus favoring product formation.

  3. They increase the stability of the product of a desired reaction by allowing ionizations, resonance, and isomerizations not normally available to substrates.

  4. They lower the activation energy for the conversion of substrate to product.

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TLS Online TPP Program

#Question id: 7287

#SCPH01 Biochemistry

Following statements are regarding to the the floral quartet model and the underlying ABCDE model of organ identity determination in Arabidopsis thaliana.

A. Five floral organ identities (sepals, petals, stamens, carpels, and ovules) are specified by the formation of floral organ-specific tetrameric complexes of MADS-domain transcription factors that bind to two nearby enhancer elements, forming a DNA loop in between.

B. A complex of two class A proteins (APETALA 1) and two class E proteins  (SEPALLATA) determines petal identity.

C. A complex of one class A protein, one class E protein, and one of each of the class B proteins (APETALA 3 and PISTILLATA) determines sepal identity.

D. A complex of one class E protein, two class B proteins, and one class C protein (AGAMOUS) determines stamen identity, while a complex of two class E proteins and two class C proteins determines carpel identity.D. A complex of one class E protein, two class B proteins, and one class C protein (AGAMOUS) determines stamen identity, while a complex of two class E proteins and two class C proteins determines carpel identity.

E. A complex of one class E protein, one class C protein, and one of each of the class D proteins (SHATTERPROOF and SEEDSTICK) controls ovule identity.

Which of the following combination are correct?

TLS Online TPP Program

#Question id: 22951

#SCPH06 I Botany

Which of the following combination of genes are floral meristem identity?

TLS Online TPP Program

#Question id: 18370

#SCPH01 Biochemistry

Corn, wheat, soybean, peas, and beans are few crops which are used as hyperaccumulators as they can 

TLS Online TPP Program

#Question id: 5038

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

The folding of sheets of cells, the migration of cells, and cell death are all mechanisms of

TLS Online TPP Program

#Question id: 15648

#SCPH05 I Biotechnology

The main function of baffles in a bioreactor are
P. to prevent a vortex
Q. to increase aeration
R. to reduce interfacial area of oxygen transfer
S. to reduce aeration rate