Fall05midterm_key

Fall05midterm_key - 1A/4B. (1 point for each correct...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1A/4B. (1 point for each correct answer) Characteristic Amino Acid #1 Amino Acid #2 Negatively charged R group Glu, Asp Aromatic Phe, Tyr, Trp Contain sulfur Met, Cys Contain OH group Ser, Thr 2A/5B. This problem was deleted 3A/6B a) (1 point for each correct answer) Name of amino acid One letter code # 1 Alanine A # 2 Glycine G # 3 Phenylalanine F # 4 Valine V # 5 Glycine G b) (3 points) zero none of the side chains have any charge and the positively charged N terminus and negatively charged C terminus cancel each other out for a zero net charge. c) (2 points) NONE d) (4 points) (2 points) in the core of the protein (2 points) because they are all hydrophobic 4A/1B. (2 points each) YES NO Lys to Glu x Arg to Asp x Val to Leu x Gln to Asn x Ala to Thr x 5. The following sentences may be TRUE or FALSE. If they are TRUE, then just write TRUE. IF they are FALSE, then CORRECT the sentence by replacing or crossing out a word or two. (3 points each) a. Hydrogen bonding occurs between NH and C=O groups in an helix TRUE b. The R groups face OUTWARDS in an helix c. The main chain of a protein is HYDROPHILIC . d. Several Lys residues in a row would help DE stabilize an helix e. GLU at the N-terminal end of an helix would help stabilize it. TRUE f. In a helical wheel, amino acids are plotted every 100 DEGREES around a circle g. In a sheet, all of the R groups protrude on OPPOSITE sides of the sheet h. A turn often connects 2 adjacent antiparallel strands TRUE i. Weak interactions that help to stabilize protein structures include (DELETE DISULFIDE BONDS) hydrogen bonds and hydrophobic interactions. j. If repeated, the sequence Gly-X-Pro will form a COLLAGEN coiled coil k. A hair permanent involves the reduction and oxidation of SH groups that link HELICES together....
View Full Document

This note was uploaded on 04/17/2008 for the course BIBC 100 taught by Professor Nehring during the Fall '07 term at UCSD.

Page1 / 7

Fall05midterm_key - 1A/4B. (1 point for each correct...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online