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Biochemistry ACS Final Exam Questions and Answers Fully Solved $13.49   Add to cart

Exam (elaborations)

Biochemistry ACS Final Exam Questions and Answers Fully Solved

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  • Biochemistry ACS
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  • Biochemistry ACS

Biochemistry ACS Final Exam

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  • September 3, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Biochemistry ACS
  • Biochemistry ACS
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Biochemistry ACS Final Exam

What is the D configuration of a sugar in a Fisher projection? - answerchyrol carbon
furthest from the carboxyl group

hydroxyl on right

What is the L configuration of a sugar in a Fisher projection? - answerhydroxyl on left

What is the difference between glycogen and amylopectin? - answerglycogen- has
branches about every 10 residues (more highly branched)

amylopectin- has branches about every 25

What is amylose made up of? - answerglucose

What makes up starch? - answeramylose
amlyopectin

What is a glycosidic bond? - answerlinks two monosaccharides together at points 1 and
4

What is the difference between an alpha(1-4) and beta(1-4) linkage? - answeralpha:
when the oxygen is pointed down in a glycosidic bond

beta: when the oxygen is pointed up in a glycosidic bond

What is the definition of a carbohydrate? - answerall have hydroxyl and carbonyl
functional groups

Difference between aldose and ketose - answeraldose has an aldohyde

ketose has a ketone

What makes up sucrose? - answerfructose and glucose monosaccharides

What makes up lactose? - answerglucose and galactose monosaccharides

What makes up mannose? - answertwo glucose monosaccharides

What are lipids? - answersoluble in other nonpolar solvents (not water)

, What are triglycerides composed of? - answerglycerol and three fatty acids

What is saponification? - answerbase hydrolysis of a triglyceride or other fat

strong base is added

breaks ester linkages to release hydroxyls and form glycerol

What has a higher level of unsaturation -- oils or fats? - answeroils

liquid at room temperature

What is the structure of the plasma membrane? - answerhydrophylic head
hydrophobic fatty acid tails
proteins span the phospholipid bilayer

Why type of amino acid is present in the plasma membrane among the fatty acid tails? -
answerhydrophobic/nonpolar

What is passive transport (simple diffusion)? - answerno energy required
no protein required
move from high concentration to low concentration

water, gases, ethanol (small nonpolar) can pass through

What is facilitated diffusion? - answerrequires protein
no energy required

molecules are two large to go through on their own

What is active transport? - answerenergy is required
moves from low to high concentration

How many carbon atoms do most fatty acids have? - answereven number

What bond holds nucleotides together? - answerphosphodiester bond

What base pairing exists in nucleic acids? How many hydrogen bonds between them? -
answerG--C (3 hydrogen bonds)
A--T (2 hydrogen bonds)

What is the first amino acid always placed in a protein? - answermethionine (Met)
start codon

What 3 things make up a nucleotide? - answernitrogen base
phosphate group

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