WGU C785 Biochemistry Exam 1 Latest 2023 2024

WGU C785 Biochemistry Exam 1 ( Latest 2023 – 2024 )

(ACTUAL EXAM ) Questions and Answers (Solved)

• A subatomic particle with a single negative electrical charge and a mass about

1/2,000 that of a neutron or proton. One or more electrons move around the nucleus of an atom.

Answer: electron

• The capacity to cause change, especially to do work (to move matter against an

opposing force).

Answer: energy

• A type of strong chemical bond in which two atoms share one or more pairs of

valence electrons.

Answer: covalent bond (kM-v2-lent)

• A chemical bond resulting from the attraction between oppositely charged ions.

Answer: ionic bond (+-on2-ik)

• A type of weak chemical bond that is formed when the slightly positive

hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule or in another region of the same molecule.

Answer: hydrogen bond

• An organic molecule possessing both a carboxyl and an amino group (see image for

amino group). Amino acids serve as the monomers of polypeptides. 1 / 2

Answer: amino acid (uh-mn2-M)

• A chemical group present in organic acids and consisting of a single car- bon

atom double-bonded to an oxygen atom and also bonded to a hydroxyl group.

Answer: carboxyl group (kar-bok2-sil)

• Having no affinity for water; tending to coalesce and form droplets in water.

Answer: hydrophobic (h+2-drM-fM2-bik)

• Having an affinity for water.

Answer: hydrophilic (h+2-drM-fil2-ik)

• A strong covalent bond formed when the sulfur of one cysteine monomer bonds to

the sulfur of another cysteine monomer.

Answer: disulfide bridge/bond

• Consists of an amino group, carboxyl group, R group; At the center of the amino

acid is an asymmetric carbon atom called the alpha (±)(±c)arbon: What is the basic structure of an amino acid?

• four different partners are an amino group, a carboxyl group, a hydrogen atom,

and a variable group symbolized by R. The R group, also called the side chain, differs with each amino acid.

Answer: List the 4 amino acid groups and describe what they look like.

• Answer Amino acids are grouped according to the properties of their side chains.-

: How do you identify the 3 different types of side chains for amino acids: non-po- lar/hydrophobic, polar, and charged?

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