32. What is the atomic number of nitrogen? D. 14 Cy 33. What is the universal so

Question

32. What is the atomic number of nitrogen? D. 14 Cy 33. What is the universal solvent? A. Alcohol D. There's not one B. Water C. Acetone a solution of pH 7? -34. A solution of pH 4 has how many times the concentration of free protons as D. 1000 times A 10 times B. 30 times C 100 times 35. Which of the following is not a function of proteins? D. Support A. Metabolism B. Transport C. Energy storage 36. What does "complementary base pairing" mean? A. The way a protein folds around itself 8. The way amino acids are bonded together in a protein C. The specificity in bonding between nucleotide bases in a DNA molecule D. The attraction between free hydroxide ions in an alkaline solution 37. What is a carbohydrate polymer called? B. Polysaccharide C. Nucleotide D. Sugar A, Polypeptide 38. What is an enzyme? A. The type of RNA that makes up the ribosomes 8. A protein that catalyzes metabolic reactions C. A single-stranded DNA molecule D. A structural protein 39. What characteristic does a hydroxyl group convey to a biomolecule? A. It's polar B. It's acidic C. It's basic D. High-energy bonds 40. Which of the following is not a component of a phospholipid? B. Amino acid A Phosphate C. Fatty acid D. Glycerol 41. What type of reaction is typical of catabolic processes? A. Reduction B. Condensation reaction D. Photosynthesis C. Hydrolysis 42. What does it mean to say that a protein has been denatured? A. That it has been changed by a mutation in DNA B. That its shape has changed so that it can't function C. That it has been activated by methylation D. That it consists of more than one polypeptide in a particular configuration

Explanation / Answer

Answer:

32). C. 7

33). B. Water

Explanation:

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid.

34). D. 1000

Explanation:

The pH scale is a logarithmic one, meaning that each pH unit has 10 times as many hydrogen ions as the unit above it. So, at pH 4, there are 10 times more hydrogen ions than at pH 5, 100 times more hydrogen ions than at pH 6 and 1000 times more hydrogen ions than at pH 7.

35). A. Metabolism

36). C. The specificity in bonding between nucleotide bases in a DNA molecule

37). B. Polysccharide

Explanation:

Polysaccharide is a carbohydrate (e.g. starch, cellulose, or glycogen) whose molecules consist of a number of sugar molecules bonded together.

38). B. A protein that catalyzes metabolic reactions

Explanation:

Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy.

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