8. Amino acids typically consist of a central carbon atom. Attached to this central carbon are an amino group, a carboxylic acid group, a side chain (the R group), and a hydrogen (a-hydrogens). What would happen to the a-alpha helix if a-hydrogens are replaced by a second side chain (second R group)?

8. Amino acids typically consist of a central carbon atom. Attached to this central carbon are an amino group, a carboxylic acid group, a side chain (the R group), and a hydrogen (a-hydrogens). What would happen to the a-alpha helix if a-hydrogens are replaced by a second side chain (second R group)?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter14: Dna Structure And Replication

Section: Chapter Questions

Problem 3TYK: Pyrimidines built from a single carbon ring are: a. cytosine and thymine. b. adenine, cytosine, and...

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The first and major effect in denaturation of proteins is that: a. peptide bonds break. b. helices unwind. c. sheet structures unfold. d. tertiary structure is changed. e. quaternary structures disassemble.
1. What kind of bond links a base to some sugar? Is the sugar an alpha or beta anomer? In what position(s) of the sugar does this occur? In what position(s) of the base does this occur?
3. How many amino acids are there in the polypeptide (protein)?
2. Which part of an amino acid gives it its unique identity? A. the long carbon-hydrogen tails of the molecule B. the carboxyl and amino groups C. the components of its side chain D. the glycerol molecule that forms the backbone of the amino acid
4. Which atom with a lone pair in the structure contributes to theresonance property of the nucleotide? Choose the letter of youranswer in the structure.5. How many hydrogen bonds is the structure pointing at E capableof forming?6. What is the name of the nitrogenous base which iscomplementary to pair with the nitrogenous base in the structure?
1. What is the name of the nucleotide shown here?2. Identify all pointed structures (A to H)3. Which structure causes the acidity of the nucleotide? Choose theletter of your answer.
7. Native conformation of proteins may result from: a) hydrophobic interactions b) H-bonds c) ionic bonds d) covalent bonds e) all a-d may contribute to native conformation
1. Which of the following forms of lysine would you expect to predominate at low pH, neutral pH and high pH? 2. One of the 20 amino acids is unusual in that its side chain contains a ring that incorporates the amine functional group of the amino acid. What is the name of this amino acid? Write the chemical structure of this amino acid at physiological pH.
1. What bonds are responsible for joining the pentose sugar of one nucleotide to the phosphate group of the other nucleotide? 2. What bond connects the nitrogenous base to the pentose sugar?
6. THE FOLLOWING ARE DESCRIPTION OF NUCLEIC ACIDS. EXCEPT?A. MADE UP ALSO OF A NUCLEOSIDEB. COMPOSED OF CHAINS OF NUCLEOTIDESC. VERY LARGE, COMPLEX MOLECULESD. POLYMERS OF NON-REPEATING UNITS OF NUCLEOTIDES 7. ALL OF THE FOLLOWING ARE TRUE ABOUT DNA, EXCEPT?A. CONTAINS THE NITROGENOUS BASE URACILB. WITH ALPHA-HELICAL STRUCTUREC. INVOLVED IN PROTEIN SYNTHESISD. GENETIC CARRIER 8. WHICH OF THE FOLLOWING IS/ARE RESPONSIBLE FOR PROTEIN SYNTHESIS?A. T-RNAB. ALL OF THEMC. R-RNAD. M-RNA 9. WHICH OF THE FOLLOWING CAN AFFECT THE DNA STRUCTURE?A. ALL OF THEMB. UVC. BASE ANALOGUESD. IONIZING RADIATION 10. ALL OF THE FOLLOWING ARE PROTEIN ENZYMES, EXCEPT?A. PEPSINB. CHYMOTRYPSINC. PTYALIND. TRYPSIN
5.What is the structural difference between ribose and deoxyribose
1. . In one sentence each: a) Define a nucleic acid. b) . What is/are the major chemical difference(s) between RNA and DNA? c) How do this difference(s) differentiate RNA from DNA in terms of functions in a livingsystem?