FREE CHEMISTRY AND STUDY GAMES ABOUT WEEK 2

PDF Download

FREE CHEMISTRY AND STUDY GAMES ABOUT WEEK 2

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -42 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Q: What is the most rigid amino acid?

Answer:

A: Proline.

Question 2: Q: Define zwitterion.

Answer:

A: A compound with a negative charge and a positive charge on the same molecule.Question 3: Q: Which amino acids contain sulfur?

Answer:

A: Methionine and Cysteine.

Question 4: Q: Name the polar amino acids with a positive charge. Are these amino acids considered basic or acidic?

Answer:

A: Arginine, Lysine, and Histidine. These are considered basic amino acids present in acidic form.

Question 5: Q: True or false? Ka is the association constant.

Answer:

A: True!

Question 6: Q: In our notes it mentions a "21st" amino acid. Name it.

Answer:

A: Selenocysteine.

Question 7: Q: What is the isoelectric point (pI)?

Answer:

A: The isoelectric point (pI) is the pH at which a molecule carries no net electrical charge.Question 8: Q: Proteins are chains of amino acids linked together by what type of bonds?

Answer:

A: Peptide bonds.

Question 9: Q: Define amphoteric.

Answer:

A: A molecule that can act as an acid or a base.

Question 10: Q: What do kinases do?

Answer:

A: They add phosphate.

Question 11: Q: What determines the properties of an amino acid?

Answer:

A: The side group AKA R group.

Question 12: Q: What is required for glycosylation to take place?

Answer:

A: You must have a -OH group.

Question 13: Q: What is the "first" amino acid found in a protein.

Answer:

A: Methionine.

Question 14: Q: There is one amino acid that is not chiral, which one?

Answer:

A: Glycine.

Question 15: Q: Does lipid addition increase or decrease solubility?

Answer:

A: Decrease! It increases affinity for membranes.

Question 16: Q: All of the amino acids in proteins exhibit the same absolute steric configuration as _______.

Answer:

A: L-glyceraldehyde.

Question 17: Q: She skipped most of the last two pages this section (pgs 2-9 & 2-10).

Answer:

A: Make sure you read them just in case. Notice the adult (HbA) and fetal (HbF) hemoglobin isoforms.HbA contains alpha & beta, HbF contains alpha & gamma.Question 18: Q: At physiological pH the _______ group will be unprotonated and the _______ group will be protonated.

Answer:

A: The carboxyl group will be unprotonated and the amino group will be protonated.Question 19: Q: What do phosphatases do?

Answer:

A: They remove phosphate.

Question 20: Q: The negtive log of Ka is known as what?

Answer:

A: The pKa.

Question 21: Q: Which amino acid(s) can form a disulfide bond?

Answer:

A: A disulfide bond can be formed between two cysteine molecules.

Question 22: Q: A tetrahedral carbon atom with 4 distinct constituents is said to be _______.

Answer:

A: Chiral.

Question 23: Q: Which amino acids contain ring structures?

Answer:

A: Phenylalanine, Tryptophan, and Tyrosine.

Question 24: Q: What is the general structure of an amino acid?

Answer:

A: An amino group, an alpha-carbon, a carboxyl group, a hydrogen, and an R group.Question 25: Q: A peptide bond is a covalent bond between the _______ group and _______ group of an adjacent amino acid.

Answer:

A: Between a carboxyl group and amino group.

Question 26: Q: This amino acid "puts kinks in things".

Answer:

A: Proline.

Question 27: Q: On an amino acid, what is the charge of the carboxyl group at physiologic pH?

Answer:

A: Negative.

Question 28: Q: What is the most flexible amino acid?

Answer:

A: Glycine.