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TLS Online TPP Program

#Question id: 4371

Which statement is not true about the TATA box?

#Unit 3. Fundamental Processes

  1. The TBP portion of the general transcription factor TFIID binds to the TATA box forming a molecular clamp.

  2. It is located about 19-27 bp upstream from the transcription start site of class II genes.

  3. Its sequence is highly conserved among all species.

  4. This region of DNA is more easily unwound to an open complex than other general sections of DNA.

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TLS Online TPP Program

#Question id: 34143

#Unit 7. System Physiology – Animal

Which of the following best explains how normal plasma oxytocin levels at the onset of labor can still result in powerful uterine contractions?
TLS Online TPP Program

#Question id: 10193

#Unit 6. System Physiology – Plant

Leaf orientation is controlled by a specialized organ that contains motor cells that change their osmotic potential and generate mechanical forces that determine laminar orientation, that specialized organ is known as
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: 1238

#Unit 4. Cell Communication and Cell Signaling

Which of the following can lead to loss-of-heterozygosity in a tumor-suppressor gene?

a. deletion of the normal copy                       

b. non dysjunction during mitosis

c. somatic mutation of the normal copy

d. mitotic recombination between a wild-type and mutant allele
TLS Online TPP Program

#Question id: 5554

#Unit 5. Developmental Biology

Even in the absence of sperm, metabolic activity in an egg can be artificially activated by ________.