TLS Online TPP Program

#Question id: 11188


Refer to the following graph of an action potential to answer the question.

The minimum graded depolarization needed to operate the voltage-gated sodium and potassium channels is indicated by the label ________.

#Unit 7. System Physiology – Animal
  1. A
  2. B
  3. C
  4. E
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TLS Online TPP Program

#Question id: 12189

#Unit 2. Cellular Organization

Following statements are regarding to model for reassembly of the nuclear envelope during telophase. 
A. Extensions of the endoplasmic reticulum (ER) associate with each decondensing chromosome and then fuse with one another, forming a double membrane around the chromosome. 
B. Dephosphorylated nuclear pore subcomplexes reassemble into nuclear pores, forming individual mini-nuclei called karyomeres. 
C. The enclosed chromosome further decondenses, and subsequent fusion of the nuclear envelopes of all the karyomeres at each spindle pole forms a single nucleus containing a full set of chromosomes.
D. Phosphorylated nuclear pore subcomplexes reassemble into nuclear pores, forming individual mini-nuclei called karyomeres.
Which of the following is incorrect?

TLS Online TPP Program

#Question id: 33360

#Unit 1. Molecules and their Interaction Relevant to Biology

a. HbS (sickle-cell Hb): substitutes a Val for a Glu on the surface
b. Hb Cowtown: eliminates an ion pair involved in T-state stabilization
c. Hb Memphis: substitutes one uncharged polar residue for another of similar size on the surface
d. Hb Bibba: substitutes a Pro for a Leu involved in an α helix

Which Hb variant least likely to cause pathological symptoms

TLS Online TPP Program

#Question id: 1449

#Unit 4. Cell Communication and Cell Signaling

Src is a:

TLS Online TPP Program

#Question id: 5001

#Unit 11. Evolution and Behavior

Fossil evidence indicates that several kinds of flightless dinosaurs possessed feathers. If some of these feather-bearing dinosaurs incubated clutches of eggs in carefully constructed nests, this might be evidence supporting the claim that

TLS Online TPP Program

#Question id: 16325

#Unit 7. System Physiology – Animal

Symptoms of Moderate Anxiety: