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TLS Online TPP Program

#Question id: 5254

Following signal transduction pathways can be grouped into several basic types, based on the sequence of intracellular events.

According to above figure, which of the following correctly represents the basic concepts of all signalling pathway?

#Unit 5. Developmental Biology

  1. A-cytosolic kinase, B-receptor-associated kinase, C-protein cleavage, D-protein subunit dissociation

  2. A-protein subunit dissociation, B-receptor associated kinase, C-cytosolic kinase, D-protein cleavage

  3. A- receptor associated kinase, B- cytosolic kinase, C- protein subunit dissociation, D- protein cleavage

  4. A- receptor associated kinase, B- cytosolic kinase, C- protein cleavage, D- protein subunit dissociation

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TLS Online TPP Program

#Question id: 1114

#Unit 4. Cell Communication and Cell Signaling

Sutherland discovered that the signaling molecule epinephrine is responsible for which of the following events?
TLS Online TPP Program

#Question id: 15836

#Unit 8. Inheritance Biology

You are interested in a new type of autosomal dominant mutation that gives purple eyes in Drosophila. You have a true-breeding purple-eyed line carrying a mutation that you call pr-1. You have isolated a second purple-eyed mutation that you call pr-2, which you have established in a true-breeding line that also carries a recessive marker st, which gives stubby legs. You cross a fly from the pr-1 line to a fly from the st, pr-2 line producing F1 females which you then cross to males from a true breeding st line (normal eyes). From this cross, 1000 progeny flies can be categorized into four different phenotypic classes:
                   
What is the phenotype of a pr-1 pr-2 double mutant?
TLS Online TPP Program

#Question id: 16119

#Unit 7. System Physiology – Animal

Following statements are regarding to Shivering, which is the most potent mechanism for increasing heat production in the body. 
A. Cold environmental temperatures activate centers in the posterior hypothalamus during shivering, which then activate the α and γ motoneurons innervating skeletal muscle. 
B. Shivering involves skeletal muscle contracts rhythmically, generating heat and raising body temperature.
C. Shivering involves stimulation of Na+-K+ ATPase and raising body temperature.
D. Shivering involves stimulation of β receptors in brown fat, which increases metabolic rate and heat production.
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 11968

#Unit 7. System Physiology – Animal

 Upon activation by stomach acidity, the secretions of the parietal cells ________.
TLS Online TPP Program

#Question id: 13214

#Unit 6. System Physiology – Plant

The stomata will open less or even remain closed on a sunny morning when