Bchm 307 - Study guides, Class notes & Summaries

BCHM 307 QUIZ 2 QUESTIONS WITH VERIFIED ANSWERS Hydrocarbons will always be (Hydrophilic/hydrophobic) - Answer-Hydrophobic 2 amino acids with sulfur - Answer-Methionine and Cystine What is the first amino acid in all proteins - Answer-Methionine (Met, M) What is the start codon? - Answer-Methionine (Met, M) Three letter start codon - Answer-AUG Only amino acid with a fused ring system, most proteins have atleast one, absorbs UV light at 280nm - Answer-Tryptophan (Trp, N) Only...

BCHM 307 EXAM 1 QUESTIONS WITH ANSWERS Secondary structure - Answer-the local 3-dimensional structure of the peptide backbone - there are 4 major classes of secondary structure (alpha helix, beta sheet, turns, and random coil) The alpha helix of the secondary structure - Answer-the alpha helix is a helical region of the peptide backbone that is stabilized by hydrogen bonding - carbonyl residue of each amino acid residue is hydrogen bonded to the amide group 4 residues further toward the c...

BCHM 307 QUIZ 3 EXAM QUESTIONS WITH REVISED ANSWERS ALL UPDATED Glucose and galactose are _____ of each other. - Answer-epimers The transformation of a monosaccharide into its _____ occurs easily and does not require the assistance of a catalyst. - Answer-anomer What is the only monosaccharide that is achiral? - Answer-dihydroxyacetone Which of the following are characteristic of cellulose? - Answer--unbranched polymer -highly extended fibers -beta(1→4) glycosidic bonds -extensiv...

Which DNA strand is replicated exclusively in a discontinuous fashion? a. Leading strand b. Forward strand c. Reverse strand d. The strand read in 5' to 3' direction e. Lagging strand - Answer e. Lagging strand

BCHM 307 HOMEWORK REVIEW TEST QUESTIONS WITH ALL CORRECT ANSWERS Which of the following transport systems is used in the inner mitochondrial membrane? IMS = intermembrane space a. symport of ATP and Pi from IMS to matrix b. antiport of ADP from IMS to matrix and of ATP from matrix to IMS c. antiport of ADP from IMS to matrix and Pi from matrix to IMS d. antiport of ATP from IMS to matrix and of ADP from matrix to IMS - Answer-b. antiport of ADP from IMS to matrix and of ATP fr...

BCHM 307 PHOTOSYNTHESIS TEST QUESTIONS WITH ALL ANSWERS REVISED & UPDATED Which of the following describes photorespiration? 1) consumes NADPH 2) consumes ATP 3) consumes oxygen 4) consumes CO2 5) all of these answers are correct - Answer-5) all of these answers are correct Regeneration of the rubisco substrate, ribulose-1, 5-bisphosphate involves which of the following sugars? 1) a pentose-phosphate 2) a hexose-phosphate 3) a tetrose-phosphate 4) a heptose-phosphate 5) all o...

What is most critical for maintaining the tertiary structure of a protein? - Answer Hydrophobic interactions What level of protein structure is characterized by the three dimensional structure of an entire polypeptide including all amino acid side chains? - Answer Tertiary What is the N-Terminal residue of the peptide AYSDG - Answer Alanine

Which of the following is true regarding heparin? - Answer -it is used clinically as an anticoagulant -it simultaneously binds to antithrombin and the target of antithrombin -it is a sulfated polysaccharide -it is an allosteric activator of antithrombin If an enzyme-catalyzed reaction has a velocity of 2 mM/min and a Vmax of 10 mM/min when the substrate concentration is 0.5 mM, what is the Km? - Answer 2 mM

Pathways leading to essential amino acids are good targets for ___ - Answer herbicides Glyphosphate (Roundup) is an inhibitor of ___, an enzyme of the shikimic acid pathway - Answer EPSP synthase Glyphosphate blocks __ - Answer Blocks the production of aromatic amino acids Ascorbic acid (vitamin C) is required for the production of - Answer Hydroxyproline and

An enzyme that forms a covalent bond with its substrate during the course of a reaction is considered to undergo _____. - Answer covalent catalysis Which protein in the blood is responsible for converting fibrinogen to fibrin? - Answer thrombin Different enzymes that catalyze the same reaction are known as _____. - Answer isoenzymes