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TLS Online TPP Program

#Question id: 24672

Which statement describes the mode of action of the ABCB1 transporter (the first eukaryotic ABC transporter to be recognized)?

#Unit 2. Cellular Organization
  1. During transport, the ligand binding site is alternately exposed to the exoplasmic and the cytoplasmic side of the membrane.
  2. During transport, a conserved aspartate residue is phosphorylated.
  3. This class of pumps transports only H+ ions.
  4. This transporter acts as a chloride channel.
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TLS Online TPP Program

#Question id: 16118

#Unit 7. System Physiology – Animal

Following statements are regarding to the heat production by the activation of sympathetic nervous system.
A. Activation is stimulation of β receptors in brown fat, which increases metabolic rate and heat production.
B. Activation is stimulation of α2 receptors in brown fat, which increases metabolic rate and heat production.
C. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasoconstriction. Vasoconstriction reduces blood flow to the surface of the skin.
D. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasodilation. Vasodilation reduces blood flow to the surface of the skin.
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 4784

#Unit 8. Inheritance Biology

The following is the biochemical pathway for purple pigment production in flowers of sweet pea Recessive mutation of either gene A or B leads to the formation of white flowers. A cross is made between two parents with the genotype: AaBb x aabb. Considering that the two genes are not linked, the phenotypes of the expected progenies are
TLS Online TPP Program

#Question id: 12735

#Unit 13. Methods in Biology

Match the following:
A. Maize                                  i. Modified seed storage protein
B. Tomato                              ii. Modified ripening
C. Canola                                 iii. Resistance to insects
D. Soya Bean                         iv. Seed oil modification
TLS Online TPP Program

#Question id: 28460

#Unit 5. Developmental Biology

during the formation of eye lens induction in vertebrate eye, optic vesicle and head ectoderm are function as____
TLS Online TPP Program

#Question id: 2431

#Unit 2. Cellular Organization

Examples of actin cross-linking proteins include

a. fimbrin.        b. dystrophin.  c. α-actinin.     d. spectrin.      e. myosin S1.