bio final

• In an experiment, 1400 animals with a bacterial infection are injected with a new antibiotic and 1400 animals with the infection are given an injection of a similar amount of saline solution as a control. All animals are raised at a constant 20 degrees and a day length of 12 hours light and 12 dark. After 21 days of treatment the bacterial levels of both control and experimental animals is determined. In this experiment, what variable is the independent variable?

  a. temperature at which the animals are raised

  b. whether the animals were injected with antibiotic or saline

  c. the bacterial level after 3 weeks

  d. the daylength

  e. none of the above

  b. whether the animals were injected with antibiotic or saline
• The scientific method can be used to answer any question, in any academic discipline

  a. True

  b. False


  b. false
• Which of the following steps in the scientific method would follow the development of a Hypothesis?

  a. carry out a test and analyze the results

  b. observe the phenomenon

  c. devise a test of the predictions

  d. make predictions based on the hypothesis

  e. develop additional hypotheses based on the results of the test

  d. make predictions based on the hypothesis
• Which of the following is NOT a characteristics of living organisms?

  a. they contain genetic material

  b. living organisms consist of one or more cells

  c. they can regulate their internal environment-homeostasis

  d. they can extract energy from the environment and use it to do work

  e. none- all of the above are characteristics of living organisms


  e. none- all of the above are characteristics of living organisms
• Several similar Classes can be grouped together into which of the following higher taxonomic categories?

  a. family

  b. order

  c. phylum

  d. kingdom

  e. genus

  c. Phylum
• How many variables can be tested at one time in a good experiment?

  a. only one

  b. no more than two

  c. three, if they are related to one another

  d. up to six

  e. any number as long as they are clearly defined

  a. only one
• For the following atom, how many electrons does it contain: 13/6 X?

  a. 2

  b. 4

  c. 6

  d. 7

  e. 19

  c. 6
• For this same atom, 13/6 X, how many valence electrons does it contain?

  a. 2

  b. 4

  c. 6

  d. 7

  e. 19

  b. 4
• For this same atom, 13/6 X, how many neutrons would it contain?

  a. 2

  b. 4

  c. 6

  d. 7

  e. 19

  d. 7
• For this same atom, 13/6 X, how many covalent bonds would it form with other atoms?

  a. 2

  b. 4

  c. 6

  d. 7

  e. 19


  b. 4
• When the electronegativity difference between two atoms is so great that electrons are transferred between the atoms, what type of chemical bond would then result to hold the two atoms together?

  a. Ionic

  b. Hydrogen

  c. Covalent

  d. Hydrophobic Interactions

  e. Van Der Waals

  a. Ionic
• Which of the following types of chemical bonds is due to the sharing of electrons?

  a. Ionic

  b. Hydrogen

  c. Covalent

  d. Hydrophobic interactions

  e. Three of the above

  c. covalent
• How many different elements would be represented by the following atoms?

  12/6 X-- 13/6 X-- 14/6 X-- 15/6 X

  a. one

  b. two

  c. three

  d. four

  e. eight

  a. one
• Which of the following types of chemical bonds is due to the repulsion of water?

  a. Ionic

  b. Hydrogen

  c. Covalent

  d. Hydrophobic Interactions

  e. Van der Waals

  d. Hydrophobic Interactions
• In one molecule of water, the chemical bond between oxygen and one of the hydrogen atoms would represent what type of chemical bond?

  a. polar covalent

  b. non polar covalent

  c. hydrogen

  d. ionic

  e. van der waals

  a. polar covalent
• If a solution with a pH of 8.0 is changed so that the pH is now 10.0, by how much has the hydrogen ion concentration changed?

  a. 1000x higher

  b. 100x higher

  c. 100x lower

  d. 2x higher

  e. 2x lower


  c. 100x lower
• If a solution with a pH of 8.0 is changed so that the pH is now 5.0, by how much has the hydrogen ion concentration changed?

  a. 1000x higher

  b. 1000x lower

  c. 100x lower

  d. 3x higher

  e. 3x lower


  a. 1000x higher
• If the molecular weight of a molecule is 450 daltons, how much would be added to 100ml of water to make a 0.2 M solution?

  a. 900 g

  b. 90 g

  c. 9 g

  d. 45 g

  e. 4.5 g

  c. 9 g
• If the molecular weight of a molecule is 300 daltons, how much would be added 500 ml of water to make a 0.5 solution?

  a. 300 g

  b. 150 g

  c. 15 g

  d. 75 g

  e. 7.5 g

  d. 75 g
• If the atomic weight of oxygen is 16, and that of hydrogen is 1, what is the molecular weight of water?

  a. 16

  b. 17

  c. 18

  d. 32

  e. 36

  c. 18
• Which of the following functional groups is NOT polar?

  a. carboxyl

  b. carbonyl

  c. amino

  d. phosphate

  e. none of the above- they are all polar


  e. none of the above- they are all polar
• 22. Which of the following functional groups is found in the molecule to the right?

  a. amino

  b. carbonyl

  c. methyl

  d. sulfhydryl

  e. two of the above

  (refer to the test)

  b. carbonyl
• 23. What class of organic molecule is represented by this molecule to the right?

  a. protein

  b. carbohydrate

  c. lipid

  d. nucleic acid

  e. all of the above

  (refer to the test)

  b. carbohydrate
• What class of organic molecule functions in short-term energy storage?

  a. proteins

  b. lipids

  c. carbohydrates

  d. nucleic acids

  e. all of the above

  c. carbohydrates
• What class of organic molecules functions in long term energy storage?

  a. proteins

  b. lipids

  c. carbohydrates

  d. nucleic acids

  e. all of the above

  b. lipids
• 26. Which of the following functional groups is found in the molecule to the right?

  a. amino

  b. carboxyl

  c. methyl

  d. two of the above

  e. all of the above

  (refer to the test)

  e. all of the above
• 27. What class of organic molecule is represented by this molecule to the right?

  a. proteins

  b. lipids

  c. carbohydrates

  d. nucleic acids

  e. all of the above

  (refer to the test)

  a. protein
• In which of the following types of organic molecule will every example always contain a phosphate group?

  a. proteins

  b. lipids

  c. carbohydrates

  d. nucleic acids

  e. all of the above


  d. nucleic acid
• The hydroxyl group at carbon #3 in the molecule to the right is in what position?

  a. alpha

  b. beta

  c. gamma

  d. delta

  e. epsilon

  (refer to the test)

  b. beta

  (remember: alpha above, beta below-NO)
• An alcohol would always contain which of the following functional groups?

  a. amino

  b. methyl

  c. phosphate

  d. hydroxyl

  e. carboxyl

  d. hydroxyl
• Hormones are represented by which of the following class(es) of organic molecules?

  a. proteins

  b. carbohydrates

  c. lipids

  d. two of the above

  e. all of the above

  d. two of the above

  (proteins and lipids)
• Sulfhydryl groups are important in the structure of which of the following type(s) of organic molecule?

  a. proteins

  b. lipids

  c. carbohydrates

  d. nucleic acids

  e. all of the above


  a. proteins
• Identify the type of molecule shown below:

  a. monosaccharide

  b. nucleotide

  c. polypeptide

  d. unsaturated fatty acid

  e. saturated fatty acid

  (refer to the test)


  e. saturated fatty acid
• An oligosaccharide would contain how many monosaccharides?

  a. 1

  b. 2

  c. 8

  d. about a dozen

  e. 100 or more

  d. about a dozen
• Which of the following bases always pairs with Adenine in RNA?

  a. another adenine

  b. guanine

  c. uracil

  d. cytosine

  e. thymine

  c. uracil
• Which of the following is the monomeric subunit(s) making up nucleic acids?

  a. amino acids

  b. fatty acids

  c. nucleotides

  d. monosaccharides

  e. two or more of the above

  c. nucleotides
• Which of the following bases is NOT found in RNA?

  a. adenine

  b. guanine

  c. uracil

  d. cytosine

  e. thymine


  e. thymineSee an expert-written answer!We have an expert-written solution to this problem!
• Which of the following types of chemical bonds is most important in maintaining the primary structure of proteins?

  a. covalent

  b. hydrogen

  c. ionic

  d. two or more of the above

  e. all of the above

  a. covalent
• Which of the following types of chemical bonds is not used to maintain the quaternary structure of proteins?

  a. covalent

  b. hydrogen

  c. ionic

  d. hydrophobic interactions

  e. none of the above-they are all used

  a. covalent
• Which of the following class(es) of organic molecules are important structural components of cells?

  a. proteins

  b. carbohydrates

  c. lipids

  d. two of the above

  e. all of the above

  e. all of the above