#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: 11152
#Unit 9. Diversity of Life Forms
When sufficient heat is applied, double-stranded DNA denatures into two single-stranded molecules as the heat breaks all of the hydrogen bonds. In an experiment, molecules of single-stranded DNA from species X are separately hybridized with putatively homologous single-stranded DNA molecules from five species (A-E). The hybridized DNAs are then heated, and the temperature at which complete denaturation occurs is recorded. Based on the data below, which species is probably most closely related to species X?
#Question id: 23401
#General Aptitude
#Question id: 648
#Unit 1. Molecules and their Interaction Relevant to Biology
Enzyme catalysis is regulated by a number of mechanisms. Also, the flux through metabolic pathways must be regulated. Given the metabolic pathway below, which choice accurately describes the regulation of compound G levels?
#Question id: 26504
#Unit 3. Fundamental Processes