#Question id: 22960
#Unit 7. System Physiology – Animal
#Question id: 1375
#Unit 4. Cell Communication and Cell Signaling
Four ECM ubiquitous protein components, each of which comprises multiple, distinct, repeating domains, are found in basal laminae. Given below are a list of some extracellular matrix (ECM) proteins in column A and their characteristics in column B.
|
Column A |
Column B |
|
a. Type IV collagen |
i. a large multidomain proteoglycan that binds to and cross-links many ECM components and cell-surface molecules. |
|
b. Laminins |
ii. a rodlike molecule that cross-links type IV collagen, perlecan, and laminin, which helps incorporate other components into the ECM and also stabilizes basal laminae. |
|
c. Perlecan |
iii. a family of multi-adhesive, cross-shaped proteins that form a fibrous two-dimensional network with type IV collagen and that also bind to integrins and other adhesion receptors. |
|
d. Nidogen |
iv. trimeric molecules with both rodlike and globular domains that form a two-dimensional network. |
Which one of the following is the most appropriate match?
#Question id: 13160
#Unit 4. Cell Communication and Cell Signaling
|
Column I |
Column II |
|
A. “ON” state |
i. switch I and switch II, are
bound to the terminal γ phosphate of GTP through interactions with the
backbone amide groups of conserved threonine and glycine residues. |
|
B. “OFF” state |
ii. GTPase-activating proteins |
|
|
iii. guanine nucleotide exchange
factor |
|
|
iv. Due to the removal of the γ
phosphate by GTPase-catalyzed hydrolysis causes switch I and switch II to
relax into a different conformation |
#Question id: 11298
#Unit 10. Ecological Principles
A pyramid of numbers shows _____________.
#Question id: 19830
#Unit 12. Applied Biology
The expression of avr gene must be precisely regulated: it must be expressed immediately following pathogen attack but only in