Micro Chapter 2

Organic chemicals always have a basic framework of the element _____ bonded to other atoms. A. Carbon B. Nitrogen C. Oxygen D. Hydrogen E. Phosphorous

A. Carbon

What part of a phospholipid forms hydrophobic tails? A. Fatty acids B. Glycerol C. Phosphate D. Alcohol E. All of the choices are correct

A. Fatty acids

Purines and pyrimidines are components in the building block units of all A. Nucleic acids B. Carbohydrates C. Polysaccharides D. Amino acids E. Enzymes

A. Nucleic acids

Which of the following functional groups is mismatched to the organic compound? A. Phosphate-carbohydrates B. Sulfhydryl-proteins C. Amino-proteins D. Hydroxyl-alcohols E. Carboxyl-fatty acids

A. Phosphate-carbohydrates

The purine___ always binds with the pyrimidine__ in DNA and RNA. A. guanine, cytosine B. cytosine, guanine C. adenine, guanine D. thymine, guanine

A. guanine, cytosine

Which of the following is not a pyrimidine? A. Uracil B. Adenine C. Thymine D. Cytosine E. All of these are pyrimidines

B. Adenine

All of the following are monosaccharides except A. Glucose B. Glycogen C. Fructose D. Ribose E. Deoxyribose

B. Glycogen

All of the following are lipids except A. Cholesterol B. Starch C. Phospholipid D. Wax E. Triglyceride

B. Starch

You are asked to make a 1M solution of Sodium Bicarbonate or Baking Soda (NaHCO3) for a DNA extraction lab. How many gram(s) of sodium bicarbonate (NaHCO3) should be added to 1L of water to make the required solution? Use the table of atomic masses to help you. A. 29 g B. 62 g C. 84 g D. 91.1 g

C. 84 g

Starch is the primary storage food for all of the following except A. Green plants B. Algae C. Animals D. Some fungi E. All of these store food as starch

C. Animals

Most biochemical macromolecules are polymers, which are A. Chains of hydrophobic molecules B. Chains of electrolytic molecules C. Chains of repeating monomers D. Chains of repeating carbohydrates E. Chains of hydrogen bonds

C. Chains of repeating monomers

Which pertains to DNA but not to RNA? A. Contains ribose B. Contains adenine C. Contains thymine D. Contains uracil E. Contains nucleotides

C. Contains thymine

A solution of pH 7 compared to a solution of pH 9 A. Is more basic B. Has no OH- ions C. Has more H+ ions D. Has a higher pH E. All of the choices are correct

C. Has more H+ ions

A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution. If chemical analysis was performed to identify the contents of each beaker, which of the following would be found in the beaker of DNA but not in the beaker with glucose? A. Amino acids B. Hydrogen and oxygen atoms C. Nitrogen and phosphorus D. Fatty acids E. Carbon atoms

C. Nitrogen and phosphorus

What type of bonds are formed by dehydration synthesis between adjacent amino acids? A. Glycosilic B. Ester C. Peptide D. Disulfide E. Phosphate

C. Peptide

The lipid group that is the major component of cell membranes are the A. Prostaglandins B. Waxes C. Phospholipids D. Steroids E. Triglycerides

C. Phospholipids

A solution of pH 7 compared to a solution of pH 9 A. 2 times more acidic B. 20 times more acidic C. 20 times more basic D. 100 times more acidic E. 100 times more basic

D. 100 times more acidic

One nucleotide contains A. One phosphate B. One pentose sugar C. One nitrogen base D. All of the choices are correct E. None of the choices are correct

D. All of the choices are correct

Characteristics of shared by all cells include: A. a membrane serving as a cell boundary B. the possession of genetic information C. the presence of cellular fluid D. All of these

D. All of these

Which of the following would have glycosidic bonds? A. Triglycerides B. Monosaccharides C. Polypeptides D. Polysaccharides E. ATP

D. Polysaccharides

A fat is called _____ if all carbons of the fatty acid chain are single bonded to 2 other carbons and 2 hydrogens. A. Unsaturated B. Polyunsaturated C. Monounsaturated D. Saturated E. None of the choices are correct

D. Saturated

ATP is best described as A. An enzyme B. A double helix C. An electron carrier D. The energy molecule of cells E. All of the choices are correct

D. The energy of molecule of cells

An amino acid contains all of the following except A. An amino group B. A carboxyl group C. A variable R group D. An a carbon E. A nitrogen base

E. A nitrogen base

The building blocks of an enzyme are A. Nucleotides B. Glycerol and fatty acids C. Monosaccharides D. Phosphate, glycerol, fatty acids E. Amino acids

E. Amino acids

C6H12O6 + C6H12O6 C12 H22O11 + H2O, represents: A. Formation of a peptide bond B. A decomposition reaction C. Denaturation D. Formation of a polysaccharide E. Dehydration synthesis

E. Dehydration synthesis

Which is not true about enzymes? A. Found in all cells B. Are catalysts C. Participate in the cell's chemical reactions D. Can be denaturated by heat and other agents E. Have high-energy bonds between phosphates

E. Have high-energy bonds between phosphates

All of the following are polysaccharides except A. Dextran in some bacterial slime layers B. Agar used to make solid culture media C. A cell's glycocalyx D. Cellulose in certain cell walls E. Prostaglandins in inflammation

E. Prostaglandins in inflammation

The lipid group that serves as energy storage molecules are A. Prostaglandins B. Waxes C. Phospholipids D. Steroids E. Triglycerides

E. Triglycerides