MBB 231 Study Guide - Midterm Guide: Polysaccharide, Solvent, Phosphocholine

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coralgrasshopper248

9 Feb 2016

School

Simon Fraser University

Department

Molec Biol & Biochem

Course

MBB 231

Professor

Ingrid Northwood

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Document Summary

Sugar, lipids amino acids, nucleotides: know what an anomeric carbon is and be able to recognize an anomeric carbon. Anomeric carbon- 1" c in a sugar ring (right side) Forms glycosidic linkage with 4" of the next carbon: understand the difference between starch and glycogen. Glycogen- found in animals: know the structural difference between a phospholipid , a triacylglycerol and a sphingolipid. Sphingolipid-s are derived from sphingosine (an amino alcohol with a long hydrocarbon tail) and can be glycolipids or phospholipids: know the basic membrane lipids and the characteristics that define them. Formed bt oh groups of 2 separate saccharides. If beta to beta glycosidic -> cellubiose( cant be digested), If alpha to beta -> maltose (can be digested) This diff has a significant impact on the shape of the molecule which makes these bonds accessible to specific enzymes. Glycosidic bonds always involve oh of an anomeric carbon. Alpha- oh group on carbon 1 is downward.

Related Questions

Which of the following is NOT a direct consequence of the fact that DNA polymerase can only build onto the end of an existing nucleic acid?

Question 6 options:

	DNA replication requires primers
	Bits of DNA are lost from the ends of your chromosomes in each successive round of replication
	RNA is involved in DNA replication
	The enzyme "primase" is needed for DNA replication
	There are multiple origins of replication on each eukaryotic chromosome

How does a nucleotide sequence code for a protein in nearly all living organisms?

Question 7 options:

	a sequence of 3 nucleotides can code for one of 64 different amino acids
	a sequence of 2 nucleotides can code for one of 64 different amino acids
	a sequence of 2 nucleotides can code for one of 20 different amino acids
	a sequence of 3 nucleotides can code for one of 20 different amino acids
	a sequence of 3 nucleotides can code for 3 different amino acids

Fill in the blanks. To make one strand of DNA, _________ monomers are linked together in a chain, forming a polymer we call a(n) ________ .

Question 8 options:

	nitrogenous bases, hydrogen bond
	nucleotide, nucleic acid
	amino acid, nucleic acid
	nucleotide, nitrogenous base
	amino acid, protein

Which of the following was NOT part of the ideas that Darwin used in his book On the Origin of Species?

Question 9 options:

	organisms vary in characteristics that affect survival and reproduction
	variation in traits is often heritable
	descent with modification explains life's unity and life's diversity
	organisms inherit characteristics from their parents that the parents acquired in their own lifetimes
	natural selection is a cause of adaptive evolution

Here is a hypothetical mRNA sequence:

5' G G A U G C U A G U A U G A 3'

What is the amino acid sequence encoded by this mRNA?

Question 10 options:

	Met-Ile-Val
	Asp-Ala-Ser-Met
	Met-Leu-Val
	Ser-Met-Ile-Val
	Gly-Cys

1.Nucleotides are joined together in long strands to make polymers.

â¢ Which part/s of the nucleotides is/are present in the backbone of a nucleic acid strand and how are they arranged?

â¢ Which part/s of the nucleotide is/are not in the backbone? How is it/are they linked to the backbone?

â¢ Nucleic acid polymers are not symmetrical â one end is different from the other end. What are the names for each end? What molecular feature is described by these names?

2. An important feature of nucleic acids is the ability of bases to pair.

â¢What type of bond holds together atoms within an individual nucleotide?

â¢ What type of bond holds together nucleotides that are linked in the same strand?

â¢ What type of bond holds together bases from different strands that are paired?

â¢ Which type of bond (above) is stronger?

3. RNA

â¢RNAs are typically single-stranded. Would you expect Chargaffâs patterns to apply to them? Why or why not?

â¢Although RNAs are typically single-stranded, they are involved in base pairing. Provide an example of base pairing that involves RNA. (There are many to choose from.)

â¢ In eukaryotic cells, after an RNA is transcribed, it undergoes RNA processing. What are the three types of RNA processing? Briefly explain each type. (Hint: one happens at the 5â end, one at the 3â end, and one in the middle.)

- 1.

- 2.

- 3.

MBB 231 Study Guide - Midterm Guide: Polysaccharide, Solvent, Phosphocholine

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