Practice Quiz Run Through Flashcards
A bacterial cell is exposed to an antibiotic that binds the ribosome and prevents movement along the mRNA. Which stage of translation is disrupted?
Termination
Initiation
Transcription
Elongation
Elongation
A researcher replaces the saturated fatty acids in a phospholipid bilayer with unsaturated fatty acids. What is the most likely effect?
The membrane will become impermeable to small molecules
The membrane will become more fluid
The membrane will become more rigid
The membrane will lose its hydrophobic properties
The membrane will become more fluid
A drug is designed to disrupt lipid bilayer formation. What immediate effect would this have on a eukaryotic cell?
The cell would lose its structural integrity and die
The cell would become hypertonic
The cell would form a secondary membrane
The cell would generate more cholesterol to compensate
The cell would lose its structural integrity and die
A mutation in the Shine-Dalgarno sequence of bacterial mRNA would most likely affect:
mRNA stability
Protein folding
The ability to form disulfide bonds
Initiation of translation
initiation of translation
The Calvin cycle only occurs in the presence of light because it requires ATP and NADPH produced during the light-dependent reactions.
true
false
false
Which type of bonds stabilize an alpha helix in a protein?
Hydrophobic interactions
Disulfide bonds
Ionic bonds
Hydrogen bonds between the backbone atoms
Hydrogen bonds between the backbone atoms
A mutation replaces proline in a protein with glycine. What is the likely effect?
The protein will become more rigid
The protein will become more flexible
The protein will lose its function
The protein will be degraded
The protein will become more flexible
A plant cell needs to regenerate RuBP for the Calvin cycle to continue. Which molecules are required for this step? (Select all that apply)
ATP
Triose phosphates
NADPH
CO2
ATP, Triose Phosphates
During photosynthesis, the electrons that leave photosystem II must be replaced by electrons from NADPH.
True
False
False
Cell adhesion molecules such as cadherins allow cells to attach to the extracellular matrix.
True
False
False
