#Question id: 1517
#Unit 4. Cell Communication and Cell Signaling
Following statements are regarding to cell death and its regulation.
A. In mammals, apoptosis can be triggered by oligomerization of Bax or Bak proteins in the outer mitochondrial membrane, leading to efflux of cytochrome c and SMAC/DIABLO proteins into the cytosol; these proteins then promote caspase activation and cell death.
B. Direct interactions between pro-apoptotic and anti-apoptotic proteins lead to cell death in the absence of trophic factors.
C. Direct interactions between pro-apoptotic and anti-apoptotic proteins lead to cell death in the presence of trophic factors.
D. Once activated, apoptotic proteases called caspases cleave specific intracellular substrates, leading to the demise of a cell.
Which of the following statements are correct?
#Question id: 10994
#Unit 7. System Physiology – Animal
When recording lead II on an EKG, the positive electrode is the
#Question id: 12134
#Unit 10. Ecological Principles
#Question id: 1888
#Unit 4. Cell Communication and Cell Signaling
In thyroid autoimmunity, an antibody causing type V hypersensitivity may be present and is directed against:
#Question id: 12721
#Unit 6. System Physiology – Plant
There are the five groups of late embryogenesis abundant (LEA) proteins found in plants
Group
(family name) |
Functional information |
I) Group 1 (D-19 family) |
a) It is an
abundant protein in cotton embryos, Each putative dimer of this group may
bind as many as ten inorganic phosphates and their counterions |
II) Group 2 (D-11 family) |
b) Possibly functions in ion
sequestration to protect cytosolic metabolism When LE25 is expressed in
yeast, it confers salt and freezing tolerance |
III) Group 3 (D-7 family) |
c) In tomato, a
gene encoding a similar protein is expressed in response to nematode feeding |
IV) Group 4 (D-95 family) |
d) Contains more
water of hydration than typical globular proteins Overexpression confers
water deficit tolerance on yeast cells |
V) Group 5 (D-113 family) |
e) Often
localized to the cytoplasm or nucleus More acidic members of the family are
associated with the plasma membrane May act to stabilize macromolecules at
low water potential |