What is histidine's approximate pl? COOH H3N-CH CH₂ H COO- HN-CH CH₂ H N COO H3N-CH CH2 H N COO- H₂N-CH CH₂ H N bbbb 2 4 6 C 7.5 CH CH CH pKR. C H N H N H N H 2 H 6 9 +1 +2 0 H -1 CH 9

8. Structure IV is an example of 手美 HO HO он H. он но- -H но -H- но но -H но- но -H HO -H -O H H- OH H- OH OH OH H- он Он но он HO но но. ÓH II IV V 9. Which is NOT correctly paired? fibrous protein: spherical alpha helix protein: right-handed coil beta pleated sheet: fully extended peptide chain globular protein: soluble in water

HO 9. In the DNA double helix, why are purine bases on one DNA strand never paired with other purine bases on the opposite strand? There is more than one reason.

Identify the following antioxidant molecule.                  A. alpha tocopherol hydroquinone                                                                                       B.dehydroascorbic acid           CH3          CH3                                                   C. alpha tocopherol semi-quinone             \             /                                                           D. ascorbic acid                C  =  C                                                            E. alpha tocopherol quinone          /             \                                                                     : O – C               C  –  O      CH3            \\          //            \   /               C  –  C               C – CH2–CH2–CH2–CH–CH2–CH2–CH2–CH–CH2–CH2–CH2–CH–CH3             /             \            /                                   l                                l                                 l              CH3          CH2– CH2…

Is this a purine or a pyrimidine?

i General ( X N 7C Socialx C Clever | P X 4 General ( x di General ( x N Third Ma A app.edulastic.com/student/assessment/60525b29af74cf0008c2b68f/class/5f20cf3d5dd16de > NEXT I BOOKMARK E· Question 9/19 Mistakes or Mutations in the DNA can be: Harmful B Beneficial BL C Neutral D All of the above O Type here to search 6) DELL

NH2 0=P-OH H2C H H H H. ÓH amino acid DNA lipid nucleotide glucose

Answer the questions in the table below about this molecule:

0 0=P-0-CH₂ 0- H 1) How would you designate this acid in a abbreviation ? 09-0-962 6- H 3) Provide -NH₂ one-letter AR # # 2) 15 this a strand of DNA of RNA? How do you know? an Ntl₂ 0=P-O-CH₂ A K он н abbreviation for the Strand of DNA WITH complementary bases to the one shown above. Indicate the '5' and 3 ends

Can I have a check on 9 and help on 10