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Examination 1 with Solution - Introductory Biology I | BIO 311C, Exams of Biology

The University of Texas at AustinBiology
Prof. Jerry J. Brand

Material Type: Exam; Professor: Brand; Class: INTRODUCTORY BIOLOGY I; Subject: Biology; University: University of Texas - Austin; Term: Spring 2009;

Typology: Exams

Pre 2010

Uploaded on 08/31/2009

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BIOLOGY 311C - Brand
Spring 2009
NAME (printed very legibly) _________________Key____________________ UT-EID ________________
EXAMINATION I
Before beginning, check to be sure that this exam contains 7 pages (including front and back) numbered
consecutively, and that you have been provided with a clean Answer Sheet. Then immediately print your name
and UT-EID legibly at the top of this page. Also print and bubble in your name and your UT-EID (not your
social security number) on the front of the Answer Sheet in the spaces provided. The first 38 questions are
“multiple choice”, with only one correct answer. Mark the letter corresponding to the correct answer to each of
these questions in the appropriate location on the Answer Sheet, using a No. 2 pencil. Write answers to
Questions 39 – 42 directly on this exam, in the spaces provided with the questions. Print neatly if your
handwriting is likely to be difficult to read. Turn in both this exam and the Answer Sheet after checking to be
sure that your name is clearly written in both places and all questions have been answered in the appropriate
locations. You must turn in your exam on or before 9:55 a.m.
1. A divalent cation contains:
a. a total of two electrons.
b. a total of two protons.
c. two net positive charges.
d. two net negative charges.
2. If a hydrogen molecule is separated into its two separate atoms such that each atom keeps one of the
previously shared electrons, then:
a. each of the atoms can be written as H+ .
b. one of the atoms is an anion while the other atom is a cation.
c. both atoms will be an electrically neutral hydrogen atom.
d. each of the separated atoms will be chemically stable.
3. Which one of the following atoms, when it occurs in biological molecules, does not have a covalency higher
than 2?
a. S
b. N
c. P
d. C
4. Most of the largest molecules in living cells:
a. simultaneously carry multiple positive and negative electric charges.
b. carry a few (3 – 10) electric charges.
c. do not carry any net electrical charge.
d. have a net positive charge.
5. An illustration of a molecule that demonstrates its 3-dimensional shape is called a:
a. chemical formula.
b. geometric formula.
c. structural formula.
d. stereo formula.
Spring 2009 Exam 1 p. 1 BIO 311c Brand
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Download Examination 1 with Solution - Introductory Biology I | BIO 311C and more Exams Biology in PDF only on Docsity!

BIOLOGY 311C - Brand Spring 2009

NAME (printed very legibly) _________________ Key ____________________ UT-EID ________________

EXAMINATION I

Before beginning, check to be sure that this exam contains 7 pages (including front and back) numbered consecutively, and that you have been provided with a clean Answer Sheet. Then immediately print your name and UT-EID legibly at the top of this page. Also print and bubble in your name and your UT-EID (not your social security number) on the front of the Answer Sheet in the spaces provided. The first 38 questions are “multiple choice”, with only one correct answer. Mark the letter corresponding to the correct answer to each of these questions in the appropriate location on the Answer Sheet, using a No. 2 pencil. Write answers to Questions 39 – 42 directly on this exam, in the spaces provided with the questions. Print neatly if your handwriting is likely to be difficult to read. Turn in both this exam and the Answer Sheet after checking to be sure that your name is clearly written in both places and all questions have been answered in the appropriate locations. You must turn in your exam on or before 9:55 a.m.

  1. A divalent cation contains: a. a total of two electrons. b. a total of two protons. c. two net positive charges. d. two net negative charges.
  2. If a hydrogen molecule is separated into its two separate atoms such that each atom keeps one of the previously shared electrons, then: a. each of the atoms can be written as H

+ . b. one of the atoms is an anion while the other atom is a cation. c. both atoms will be an electrically neutral hydrogen atom. d. each of the separated atoms will be chemically stable.

  1. Which one of the following atoms, when it occurs in biological molecules, does not have a covalency higher than 2? a. S b. N c. P d. C
  2. Most of the largest molecules in living cells: a. simultaneously carry multiple positive and negative electric charges. b. carry a few (3 – 10) electric charges. c. do not carry any net electrical charge. d. have a net positive charge.
  3. An illustration of a molecule that demonstrates its 3-dimensional shape is called a: a. chemical formula. b. geometric formula. c. structural formula. d. stereo formula.
  1. Which one of the following is considered to be an organic compound?

a. H2O b. CO 2 c. CH3-NH 2 d. H2CO 3

  1. Which one of the following functional groups is illustrated in the molecule shown in abbreviated form at right? a. An alcohol b. An aldehyde c. A carboxylic acid d. A ketone
  2. Which one of the atoms whose chemical symbol is shown below is least electronegative? a. O b. H c. N d. S
  3. The characteristic bond angle for the covalent bonds extending from a carbon atom in an organic molecule such as methane is: a. 26 degrees. b. 45 degrees. c. 109 degrees. d. 180 degrees.
  4. A typical bond strength (in kJ/mole) of a hydrogen bond is: a. 3. b. 40. c. 400. d. 3 X 104.
  5. A radioactive isotope is an atom of an element: a. that is converted to a cation. b. whose nucleus has an unequal number of protons and neutrons. c. that is heavier or lighter than other atoms of the same element. d. whose nucleus decays spontaneously.
  6. The cohesion of water molecules which, for example, allows water to be transported up through a tree, is due primarily to: a. hydrogen bonds. b. polar bonds. c. covalent bonding. d. ionic (electrovalent) bonding.
  7. Black-box properties of the living state are applicable to: a. only cells. b. only whole organisms. c. only the biosphere. d. all three of the above.
  1. Which one of the following is not considered to be a component of the cell envelope of prokaryotic cells? a. A periplasmic space b. The plasma membrane c. An outer membrane (cell wall) d. A capsule
  2. Which one of the following is not a major model organism used in cell biology studies? a. E. coli (a bacterium) b. Hevea (a rubber-producing plant) c. Caenorhabditis (a round worm) d. Arabidopsis (a weedy plant)
  3. All of the living substance of a eukaryotic cell between the plasma membrane and the nucleus is properly called the: a. cytoplasm. b. cytosol. c. cytogel. d. cytoplasmic matrix.
  4. According to the definitions used in this course, an organelle of a eukaryotic cell is: a. a membrane-bounded organelle. b. an occlusion. c. a component of the cytoskeleton. d. not a living component of the cell.
  5. The function of ribosomes is:

a. H2O 2 detoxification. b. DNA replication. c. protein synthesis. d. acid hydrolysis.

  1. Which one of the following is not a component of the lumen (nucleoplasm) of a cell nucleus? a. Ribosomes b. Lamin c. Histone d. Microfilaments
  2. Which one of the following intracellular locations contains membrane-bound ribosomes? a. The lumen of the rough endoplasmic reticulum b. The cytoplasmic surface of smooth endoplasmic reticulum c. The cytoplasmic face of the nuclear envelope d. The intermembrane space of mitochondria
  3. The detoxification of toxic organic molecules, such as those with benzene rings, occurs in: a. the smooth endoplasmic reticulum. b. lysosomes. c. mitochondria. d. peroxysomes.
  4. The plasma membrane of eukaryotic cells expands by fusion with vesicles that come directly from: a. vacuoles. b. lysosomes. c. rough endoplasmic reticulum. d. golgi bodies.
  1. One tissue may be degraded while another is being formed during animal development, such as when the tail disappears from a tadpole during leg development to produce a frog. The organelle most important for the disassembly of molecules in the degraded tissue is: a. smooth endoplasmic reticulum. b. lysosomes. c. mitochondria. d. peroxysomes.
  2. Safe destruction of hydrogen peroxide in eukaryotic cells occurs within: a. smooth endoplasmic reticulum. b. lysosomes. c. mitochondria. d. peroxysomes.
  3. Which one of the following is not a component of the endomembrane system of eukaryotic cells? a. Plastid b. Vesicles derived from smooth endoplasmic reticulum c. Nuclear envelope d. Lysosomes
  4. A large central vacuole is a feature of: a. prokaryotic cells that are surrounded by a sheath. b. mature plant cells. c. irregularly-shaped animal cells. d. flagellated protist cells.
  5. The plasmodesmata of plant cells: a. are organelles that contain DNA and protein-synthesis machinery. b. contain cellulose. c. serve the same function as animal lysosomes. d. are cytoplasmic connections between adjacent cells.
  6. Which one of the following does not contain DNA? a. Proplastid b. Chloroplast c. Tonoplast d. Mitochondrion
  7. According to the endosymbiontic theory of the origin of eukaryotic cells, the incorporation of a photosynthetic prokaryote led to the development of: a. plastids. b. peroxysomes. c. the central vacuole. d. flagella.
  8. Approximately 99% of the dry weight of cells is: a. water. b. inorganic ions. c. organic molecules. d. ATP.
  1. Show an aldehyde function group hydrogen bonded to the water molecule illustrated below. Show all atoms and bonds in the functional group and illustrate the remainder of the aldehyde-containing molecule with the letter “R”. Use a dotted line to show the hydrogen bond. Show the correct bond angle of the hydrogen bond.