Biology Biology Practice Problems Solutions Library

Proteins Solutions Library

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59 solutions

Proteins

Q. Concerning the collagen triple helix:A. It is composed of three separate α-helices that coil around each other.B. The triple helix is stabilized by...

Solved • Oct 9, 2018

Proteins

Q. Given the following equilibrium, at what pH would the molecule most likely be in a zwitterionic form?H3N+-CH2-COOH ⇌ H3N+-CH2-COO- ⇌ H2N-CH2-COO-  ...

Solved • Oct 4, 2018

Proteins

Q. In the figure below, two amino acids are isomers of one another and they are:A. A and BB. B and CC. C and DD. B and D

Solved • Sep 11, 2018

Proteins

Q. Researchers have isolated a previously unstudied protein, identified its complete structure in detail, and determined that it catalyzes the breakdo...

Solved • Aug 6, 2018

Proteins

Q. Describe the secondary and tertiary structure of proteins.

Solved • Aug 3, 2018

Proteins

Q. Give the name (3 letter and 1 letter) of the following peptides.

Solved • Jul 27, 2018

Proteins

Q. Trypsin digestion of the polypeptide Asp-Arg-Val-Tyr-Lys-His-Pro-Phe gives:A. Asp-Arg, Val-Tyr-Lys, His, Pro-PheB. Asp, Arg-Val-Tyr, Lys-His-Pro-Ph...

Solved • Jul 26, 2018

Proteins

Q. Which of the followingsequences can form beta-sheet (beta-strand) structure?A. (Ala-Ser-Ala-Gly-Asn-Glu)B. (Ala-Tyr-Ala-Thr-Ser-Val)C. (Ala-Pro-Gly...

Solved • Jul 26, 2018

Proteins

Q. Which of the following bonds or interactions is/are possible contributors to the stability of the tertiary structure of a globular protein?A. Pepti...

Solved • Jul 24, 2018

Proteins

Q. In a random (amino acid sequence) polypeptide chain, rotation is severely restricted about the following bonds:A. Bond from backbone α-C to α-NH2 o...

Solved • Jul 24, 2018

Proteins

Q. Describe what makes up the primary structure of a protein. What part(s) of a protein/amino acid determine the next levels of structure (secondary s...

Solved • Jul 23, 2018

Proteins

Q. The peptide KANYE has an N-terminal ________ residue and a C-terminal ________ residue.A. Glutamic Acid, LysineB. Glutamine, LysineC. Lysine, Gluta...

Solved • Jul 23, 2018

Proteins

Q. Which of the following best describes the side chains of the nonpolar amino acids (glycine is not included)?A. They are organic bases with a positi...

Solved • Jul 23, 2018

Proteins

Q. Briefly describe the four levels of protein structure.i.) Primaryii.) Secondaryiii.) Tertiaryiv.) Quaternary

Solved • Jul 20, 2018

Proteins

Q. Extreme temperatures can be used to break the hydrogen bonds with a protein molecule. Which of the following levels of protein structure will be pr...

Solved • Jul 19, 2018

Proteins

Q. An α helix would be destabilized most by:A. interactions between neighboring Asp and Arg residuesB. the presence of an Arg residue near the carboxy...

Solved • Jul 10, 2018

Proteins

Q. Which one of the tripeptides below:A. is most negatively charged at pH 7?B. contains sulfur?C. will have the greatest light absorbance at 280nm?D. ...

Solved • Jul 10, 2018

Proteins

Q. If the environmental conditions interfere with the hydrogen bonding within a protein, what may happen? Mark all answers that apply. A. The shape of...

Solved • Jul 9, 2018

Proteins

Q. As the temperature around an enzyme rises, what happens? Mark all correct answers.A. the reaction rate can get faster.B. the enzyme can bind more t...

Solved • Jul 9, 2018

Proteins

Q. The tertiary structure of a protein is determined by:A. The primary structure of a protein.B. where it is produced in the cell.C. the quaternary st...

Solved • Jul 9, 2018

Proteins

Q. Match the amino acid on the left with the fact on the right.

Solved • Jul 9, 2018

Proteins

Q. Match each definition and example to the level of protein structure.

Solved • Jul 9, 2018

Proteins

Q. A newly isolated protein was found to contain 0.533% tyrosine by weight upon amino acid analysis.(a) What is the minimum molecular weight for the p...

Solved • Jul 6, 2018

Proteins

Q. What is the charge of the tetrapeptide Lys-Lys-His-Glu at pH 7?A. +2B. 0C. -2D. +1E. -1

Solved • Jul 6, 2018

Proteins

Q. You are given a solution of "protein X". Protein X consists of 250 amino acid residues: 38% are valine, 24% are alanine, 20% are glycine, and 18% a...

Solved • Jul 3, 2018

Proteins

Q. The toxin associated with the foodborne disease botulism is a protein. To avoid botulism, home canners are advised to heat preserved foods to boili...

Solved • Jul 2, 2018

Proteins

Q. Amino acid analysis of an oligopeptide seven residures long gave the following amino acids:Asp  Leu  Lys  Met  Phe  TyrThe following facts were obs...

Solved • Jul 2, 2018

Proteins

Q. A single, 18-amino acid peptide chain is to be assigned from the following experimental information below, your job is to provide the full triple l...

Solved • Jul 2, 2018

Proteins

Q. Describe the structure of protein (e.g. primary, secondary, tertiary... structure etc.) with the driving force of maintaining the structure.

Solved • Jun 29, 2018

Proteins

Q. In the polypeptide attached, put a box around the peptide bonds and encircle the R-groups. How many amino acids are in the polypeptide?

Solved • Jun 29, 2018

Proteins

Q. Explain the process of protein folding, include the role of chaperone proteins.

Solved • Jun 28, 2018

Proteins

Q. Describe the process of protein degradation by ubiquitination.

Solved • Jun 28, 2018

Proteins

Q. Explain the different mechanisms that regulate protein function. 

Solved • Jun 26, 2018

Proteins

Q. Describe the four levels of protein structure. Distinguish between the following pairs: pyrimidine and purine, ribose and deoxyribose, the 5' end a...

Solved • Jun 25, 2018

Proteins

Q. Proteins are polymers made up of monomers called amino acids. How many different amino typically combine to form proteins?

Solved • Jun 25, 2018

Proteins

Q. What kinds of interactions lead to the secondary and tertiary structures of proteins? What types of interactions must be disrupted to fully denatur...

Solved • Jun 22, 2018

Proteins

Q. What is a lectin? Pick one lectin and describe its function.

Solved • Jun 19, 2018

Proteins

Q. List and define the four levels of structure in a functional protein.

Solved • Jun 14, 2018

Proteins

Q. A single 14-amino acid peptide chain is to be assigned from the following experimental information below. Your job is to provide the full triple le...

Solved • Jun 11, 2018

Proteins

Q. A newly isolated protein was found to contain 0.873% phenylalanine by weight upon amino acid analysis.a. What is the minimum molecular weight for t...

Solved • Jun 11, 2018

Proteins

Q. At equilibrium, the ratio of trans to cis isomers for the X-Pro peptide bond is about 1:1, whereas the ratio is 1000:1 in favor of the trans isomer...

Solved • Jun 8, 2018

Proteins

Q. Consider a β−sheet consisting of 6 β−strands connected through β−turns. How many β−turns are required?

Solved • Jun 8, 2018

Proteins

Q. If two proteins are said to be homologous, a) What does this mean?

Solved • Jun 8, 2018

Proteins

Q. In which macromolecule would you find one of these amide bonds? Give its special name.

Solved • Jun 8, 2018

Proteins

Q. A major limitation of the ribbon model of a protein is: a. It's hard to see how the backbone folds.b. It can't show the orientation of key side cha...

Solved • Jun 7, 2018

Proteins

Q. List and define 3 major roles of proteins in the body.

Solved • May 16, 2018

Proteins

Q. Describe basic protein architecture.

Solved • May 7, 2018

Proteins

Q. If a protein is denatured, its structure has been changed enough to make the protein nonfunctional.  a. True b. False

Solved • Aug 1, 2017

Proteins

Q. How are the monomers in proteins joined?  a. Phosphodiester bonds between amino acids b. Peptide bonds between amino acids c. Peptide bonds betw...

Solved • Aug 1, 2017

Proteins

Q. An amino acid contains:  a. Nitrogen b. Nitrogen and carbon c. Carbon d. Phosphorous e. Carbon and phosphorous

Solved • Aug 1, 2017

Proteins

Q. The primary building block (monomer) of proteins is:  a. A glucose molecule b. A fatty acid c. A nucleotide d. An amino acid e. Four interconn...

Solved • Aug 1, 2017

Proteins

Q. The shape of a folded protein is determined by: a. tertiary structure b. the sequence of amino acids c. whether peptide bonds have α or β glycos...

Solved • Jul 26, 2017

Proteins

Q. There are 20 different amino acids in the proteins that make up living cells. The primary difference in the amino acids is in their: a. R groups ...

Solved • Jul 26, 2017

Proteins

Q. Which of the following pertains to protein: a. CHON b. CH c. CHO d. CHONP e. None of these

Solved • Jul 26, 2017

Proteins

Q. Denaturation, a process in which a protein loses its native shape and function, is likely to be caused by all of the following except a. being tra...

Solved • Jul 19, 2017

Proteins

Q. Alpha helix and beta pleated sheets are examples of which level of protein structure? a. zero order b. primary c. secondary d. tertiary e. qua...

Solved • Jul 19, 2017

Proteins

Q. The specific amino acid sequence in a protein is its a. zero order structure b. primary structure c. secondary structure d. tertiary structure ...

Solved • Jul 19, 2017

Proteins

Q. Functional groups found in amino acids include all of the following except a. -NH2 b. phosphate c. -COOH d. -OH e. alkyl (linked multiple carb...

Solved • Jul 19, 2017

Proteins

Q. Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group, an amino group, a carbon containing group, and a...

Solved • Jul 19, 2017