Consider a peptide AKCVSEAALRIKQEANSL. Which of the following secondary structures the peptide can fold into? a. colagen helix b. amphipathic alpha-helix c. alpha helix in a colied coil d. beta-strand

Which amino acids are most likely found in the transmembrane portion of an alpha helix? a. Lysine b. Phenylalanine c. Aspartate d. Glutamate e. All of them

Histones are a family of positively charged proteins binds tightly with negatively charged, DNA, Histones most likely contains amino acids with R groups of what type? O a. AcidicR group O b. Basic R group O c. Hydrophobic R group O d. Hydrocarbon R group O e. Non-polar R group

fill in the blank  The portion of a polypeptide sequence that can fold and has its own particular function is called a (            ).

The best definition of an endonuclease is that it hydrolyzes A. nucleotide from only the 3' -end of an oligonucleotide . B. nucleotide from either terminal of an oligonucleotide. C. phosphodiester bond located in the interior of a polynucleotide . D. bond only in a specific sequence of nucleotides. E. bond that is distal co the base chat occupies the 5' position of the bond

Describe the planar sections of the primary sequence, their influence on the shape of the protein backbone, and identify these sections given a drawing of the primary sequence.

Many transmembrane proteins have a large series of hydrophobic amino acids such as those in the middle of the protein (around b). Why would this make sense, and where would you expect these to be located in the final protein structure?

Ada is a pregnant 28 year old vegan. Her pre-pregnancy weight was 132 Ibs (60 kg), and her BMI was 24. She is now 30 weeks along, and feeling fine. Her current weight is 153 Ibs (68.5 kg).

For each of the following, identify the type of RNA involved (mRNA, rRNA, or tRNA). a. Transports the correct amino acid to the ribosome, using the information encoded in the mRNA. b. Is a major component of ribosomes. c. Specifies the order of amino acids in a protein, using a series of three-base codons, where different amino acids are specified by particular codons. d. Contains a three-base anticodon that pairs with a complementary codon revealed in the mRNA. e. Assists in making the bonds that link amino acids together to make a protein.

Propose one amino acid substitution that would disrupt the leucine zipper structure and explain why