Biology Biochemistry & Metabolism Flashcards
6 cards from real Biology Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Biology Biochemistry & Metabolism flashcards as text
The electron transport chain is located on the:
Answer: Inner mitochondrial membrane
The protein complexes of the electron transport chain are embedded in the inner mitochondrial membrane.
Which molecule is the final electron acceptor in aerobic respiration?
Answer: Oxygen
Oxygen accepts electrons at Complex IV (cytochrome c oxidase) and combines with protons to form water.
Allosteric regulation of an enzyme involves:
Answer: Binding of a regulator at a site other than the active site
Allosteric regulators bind at sites distinct from the active site, inducing conformational changes that activate or inhibit the enzyme.
During fermentation in human muscle cells, pyruvate is converted to:
Answer: Lactate
In anaerobic conditions, human muscle cells convert pyruvate to lactate via lactic acid fermentation to regenerate NAD+.
Phospholipids are amphipathic molecules, meaning they have:
Answer: Both hydrophilic and hydrophobic regions
Phospholipids have a polar phosphate head (hydrophilic) and two nonpolar fatty acid tails (hydrophobic), driving bilayer formation.
Which metabolic pathway is shared by both aerobic and anaerobic respiration?
Answer: Glycolysis
Glycolysis occurs in the cytoplasm and does not require oxygen, making it common to both aerobic and anaerobic pathways.