Biochemistry Review

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Questions and Answers

Which of the following best explains why elements in a covalent compound do not necessarily share electrons equally?

Electronegativity differences between the atoms influence electron distribution. (correct)
Covalent bonds always result in an equal distribution of electrons.
The size of the atoms involved affects electron sharing.
The number of neutrons in each atom determines electron sharing.

Intermolecular forces are generally stronger than intramolecular forces.

False (B)

Describe the role of redox reactions in cellular respiration.

Redox reactions release energy.

Enzymes can have activation sites and ______ sites, which are important for regulation.

allosteric Signup and view all the answers

What is the primary difference between cellulose and starch?

Cellulose has beta glycosidic bonds, while starch has alpha glycosidic bonds. (C) Signup and view all the answers

It is generally better to consume saturated fats rather than unsaturated fats.

False (B) Signup and view all the answers

Explain the role of chaperones in protein folding.

Chaperones assist in folding. Signup and view all the answers

In feedback ______, the end product of a metabolic pathway inhibits an earlier step in the pathway.

inhibition Signup and view all the answers

Match the type of transport with its description:

Passive Transport = Movement of molecules across the cell membrane without energy input. Active Transport = Movement of molecules against a concentration gradient, requiring energy. Facilitated Diffusion = Passive transport aided by membrane proteins. Osmosis = Movement of water across a selectively permeable membrane Signup and view all the answers

Which of the following describes the primary role of aquaporins?

Facilitated diffusion of water across the cell membrane (A) Signup and view all the answers

Flashcards

Non-Polar Covalent Bond

A bond where electrons are shared equally between atoms.

Intermolecular Forces

Attractive forces between molecules.