Mid 2 Fall 2009

Mid 2 Fall 2009 - 1 of 3 BIS 102 Fall, 2009 K. Hilt Name_...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 of 3 BIS 102 Name__________________________________________________ Fall, 2009 Last First K. Hilt Second Midterm Score (100): ___________ Circle the best answer. 1. (5 pts.) For an amino acid residue in Hb to act as a proton binding site in the Bohr effect, a) it needs to have a pK a value that is within the blood pH range and the pK a value must change between deoxy and oxy states b) it must be negative in charge c) it must have a pK a value that is above 9 d) all of the above e) “b” and “c” 2. (5 pts.) The peptide sequence ALEPTWFEHDKFVADKFVA : a) could not form an -helix b) could form an -helix c) could partially form an -helix d) could partially form an -helix with 8 H-bonds e) could partially form an -helix with 4 H-bonds 3. (5 pts.) Some organisms do not use BPG as the central allosteric effector that binds between the two -subunits of Hb. Instead they use: a) ATP b) glucose c) valine d) arginine e) mercaptoethanol 4. (5 pts.) Some species of fish have a modified Hb, where the N-termini of all four subunits are acetylated, i.e. CH 3 CO-NH-CHR 1 CONH-CHR 2 CONH-etc. These fish will have: a) the same H + and CO 2 portions of the Bohr effect as fish without the acetylation modification b) a higher H + portion of the Bohr effect, but no change in the CO 2 portion of the Bohr effect, compared to fish without the acetylation modification c) virtually no CO
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Mid 2 Fall 2009 - 1 of 3 BIS 102 Fall, 2009 K. Hilt Name_...

This preview shows document pages 1 - 2. Sign up to view the full document.

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