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Membrane and Nucleic Acids Biology Quiz

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Questions and Answers

What is the purpose of glycolysis?

To produce glucose from pyruvate

To produce ATP from glucose (correct)

To break down glucose into pyruvate

To convert pyruvate into acetyl CoA

Which enzyme is involved in the citric acid cycle?

RNA polymerase

Ribonuclease

Citrate synthase (correct)

DNA polymerase

What is the purpose of gluconeogenesis?

To produce glucose from non-carbohydrate precursors (correct)

To convert pyruvate into acetyl CoA

To break down glucose into pyruvate

To degrade glycogen into glucose

What is the main product of the pentose phosphate pathway?

NADPH Signup and view all the answers

Which molecule acts as a mobile electron carrier in the electron transport chain?

Ubiquinone (UQ) Signup and view all the answers

What is the role of ATP synthase in oxidative phosphorylation?

To establish a proton gradient for ATP production Signup and view all the answers

In protein folding, which of the following is involved in forming the tertiary structure?

Disulfide bonds Signup and view all the answers

When reading a titration curve for an amino acid, which region indicates the buffering capacity of the molecule?

Where the curve plateaus Signup and view all the answers

Which of the following interactions is primarily responsible for stabilizing the α-helix secondary structure in proteins?

Hydrogen bonds Signup and view all the answers

In enzyme kinetics, which type of inhibition involves a reversible binding of the inhibitor to the enzyme-substrate complex?

Non-competitive inhibition Signup and view all the answers

Which amino acid interaction is crucial for maintaining the tertiary structure of proteins in harsh environments, such as extreme pH or temperature?

Hydrophobic interactions Signup and view all the answers

What is the key difference between Fischer projections and Haworth structures of carbohydrates?

Orientation of hydroxyl groups Signup and view all the answers

What is the purpose of DNA replication?

To create a copy of DNA for cell division Signup and view all the answers

Which enzyme is primarily responsible for DNA transcription?

RNA polymerase Signup and view all the answers

What is the purpose of 5' capping in RNA processing?

To stabilize the 5' end of the RNA Signup and view all the answers

What is the role of the initiator tRNA in RNA translation?

To bring the first amino acid to the ribosome Signup and view all the answers

What is the role of the peptidyl transferase in RNA translation?

To form the peptide bond between amino acids Signup and view all the answers

What is the role of signal peptides in post-translational modifications?

To direct the protein to the correct organelle Signup and view all the answers