Ch 15 HW ans key - Ch. 15_HW ans key MCQ: 1) C 2) B 3) A 4)...

Info iconThis preview shows pages 1–2. 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: Ch. 15_HW ans key MCQ: 1) C 2) B 3) A 4) C 5) C 6) E 7) C True/ False: 1) F 2) T 3) F 4) T 5) T 6) F 7) F SQ: 1) A) Secondary structure: through interaction between neighboring amino acids, the polypeptide chain folds and twists into a secondary structure. Two types of secondary structure; a) alpha helix and b) beta-pleated sheet Alpha helix is a right-handed helix being composed of spiral chain of amino acids stabilized by hydrogen bonds. Beta-pleated sheets have folded polypeptide chains running either in a parallel or anti-parallel fashion against each other. B)Polyribosome: In both pro- and eukaryotic cells, mRNA molecules are translated simultaneously by multiple ribosomes. The resulting structure, an mRNA with several ribosomes attached is called polyribosome. C) SD sequence: In bacteria, the mRNA transcript contains a sequence of about 6 ribonucleotides, all purines (A and G) upstream of the AUG start codon. This sequence is called Shine-Dalgarno sequence and it base-pairs with a sequence of bases found near the 3 end of the 16s rRNA. This base-pairing helps in attachment of mRNA and a sequence of bases found near the 3 end of the 16s rRNA....
View Full Document

This note was uploaded on 12/13/2011 for the course BIO 325 taught by Professor Saxena during the Fall '08 term at University of Texas at Austin.

Page1 / 2

Ch 15 HW ans key - Ch. 15_HW ans key MCQ: 1) C 2) B 3) A 4)...

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