Biochem Flashcards
The process by which ATP is formed through the electron transport chain is called __________
A. Oxidative phosphorylation
B. Autophosphorylation
C. Substrate level phosphorylation
D. Fermentation
A
More than 30-40% of all medicines used today exert their effects by influencing what structures in the cell membrane?
A. G protein coupled receptors
B. Growth factors
C. Tyrosine kinase receptor
D. Ligand-gated ion channel receptors
A
Insulin triggers glycogen synthesis and glucose uptake through_____ signaling
A. Receptor tyrosine kinase (RTK)
B. Ion channel linked receptor
C. Intracellular
D. Gated channel
A
The purpose of metabolism is all of the following EXCEPT
A. Synthesize one substance from another
B. To convert heat energy into chemical energy
C. To use energy from food
D. Prepare waste products for excretion
B
The two laws of thermodynamics indicate that _________
A. Both quantity and quality are constant
B. Both quantity and quality are not constant
C. Quality of energy is constant but the quantity is not
D. Quantity of energy is constant but the quality is not
D
All of the following are correct about cell surface ligands EXCEPT
A. Can’t diffuse across plasma membrane
B. Bind to DNA as transcription factors
C. Polar or charged or hydrophilic
D. Trigger secondary messenger pathway
B
The tight balance between anabolic and catabolic pathways ensures that the cells ________
A. Produce more ATP
B. Produce more NADH
C. Do not deplete essential energy stores
D. Produce more FADH2
C
All G proteins have a similar structure and consist of _____ subunits.
A. Two
B. Three
C. Five
D. Seven
B
All of the following related to ATP are correct EXCEPT
A. When dephosphorylated, ATP becomes ADP
B. ATP is the energy currency of all living organisms
C. ATP is formed by attaching phosphate group to ADP with a high-energy bond
D. ATP is a long-term energy storage molecule.
D
Which allows Na+, K+, and Cl- to pass through the plasma membrane?
A. Intracellular receptors
B. Ion channel receptors
C. G-coupled protein receptors
D. Protein tyrosinke kinase
B
