Adam
Leader:
Biology 211
Course:
Instructor: Emeka Kemdirim
Date:
Proteins can be modified by reaction with acetate which results in the addition of an
acetyl group to lysine side chains as shown in the Figure below. The bond indicated in
the acetylated lysine side chain is most like:
a. Ester bond
b. Glycosidic bond
c. Peptide bond
d. Hydrogen bond
The lipid bilayer is held together primarily by:
a. The repulsion of phospholipid tails and water
b. Linkage of phospholipids together by ester bonds
c. High concentration of transmembrane proteins and cholesterol
d. Hydrogen bonds and Van deer Waals forces
Which of the following is the most likely movement for a functional plasma membrane
protein?
A. ER  Vesicles  Golgi  Lysosome  Plasma Membrane
B. ER  Vesicles  Golgi  Vesicles  Plasma Membrane
C. Nucleus  ER  Golgi  Vesicles  Plasma Membrane
D. ER  Golgi  Lysosome  Vesicles  Plasma Membrane
E. Golgi  Vesicles  Lysosome  Vesicles  Plasma Membrane
Which of the following statements regarding the fatty acid tails of phospholipids are
false?
a. Phospholipids with unsaturated tails make the bilayer more fluid because the
tails contain fewer hydrogens and thus form fewer hydrogen bonds with each
other.
b. An increase in saturated tails in the bilayer makes the membrane less fluid
because there are no kinks in the fatty acid tail.
c. An animal that was going from an environment with a temperature of 75°F to
32°F, it would want more unsaturated fatty acid tails in its membranes
d. The fatty acid tails arrangement face inward within the membrane bilayer.
Predict which of the following organisms will have the highest percentage of unsaturated
phospholipids in their membranes.
a. Domesticated dog
b. Antarctic fish
c. Lion
d. Deer
An Amphipathic molecules is characterized by
a. Being enteirly hydrophilic
b. Having both a hydrophobic and a hydrophilic end
c. Being insoluble
d. Having both a charged end and an uncharged end
e. Being entirely hydrophobic
An ionic bond between two atoms is formed as a result of
a. Sharing of electrons
b. Transfer of electrons from one atom to the other
c. Loss of electrons from both atoms
Supplemental Instruction
Exam 1 Review:
Chapter 2-4
Supplemental Instruction
Iowa State University
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d. Loss of a neutron from one atom.
8. Van der Waals attractions and hydrogen bonds are similar in that they both
a. Involve ionic interactions
b. Involve chelated metals
c. Require specific groups to attract
d. Are short range interaction that only come into play when molecules are close
9. Forces that determine the folding of a macromolecules into distinct shapes include all of
the following except
a. Hydrophobic interactions
b. Van der Waals interaction
c. Magnetic interactions
d. Ionic interactions
10. Where does the assembly or ribosome subunits occur? (ribosomes synthesis proteins)
a. Golgi App
b. Cytoplasm
c. ER
d. Nucleus
11. What are the advantages of membranes in a cell?
a. They are found in both bacteria and eukaryotes
b. They don’t let anything pass through
c. They compartmentalize the cell
d. They give the cell its shape
12. Phospholipids can form bilayer membranes because they are
a. Lipids
b. Amphoteric
c. Amphipathic
d. Hydrophobic
13. There are how many protein filaments that form the cytoskeleton of the cell?
a. 1
b. 2
c. 3
d. 4
14. Identify the cytoskeleton structure depicted in the diagram below:
a. Microtubule
b. Actin filament
c. Intermediate filament
d. Nuclear lamina
15. Which of the following would have a high density of Intermediate filament?
a. Skin epithelial cell
b. Smooth muscle cell
c. Axons of nerve cells
d. All the above
16. The structural level of a protein in which alpha helixes are not present is the
a. Primary level
b. Secondary level
c. Tertiary level
d. Quaternary level
17. 4. An amino acid does NOT contain
a. a carboxyl group
b. an amino group
c. a R group (side chain)
d. a phosphate group
18. Polarity of growing microtubules
a. Goes from the nucleus out
b. Goes from the beta-tubulin end to the alpha-tubulin end
c. Goes from the alpha-tubulin end to the beta tubulin end
d. Goes from the plasma membrane in
19. Site where macromolecules are broken down
a. Golgi
b. Cytosol
c. Lysosome
d. Peroxisome
20. Which unit molecule belongs to proteins?
a. cellulose
b. nucleotides
c. sugars
d. amino acids
21. Which of the following is not true for the RER
a. Its outer surface is studded with ribosomes
b. It performs glycosylatin
c. It inserts new proteins into the ER membrane
d. It release Ca ions into the cytoplasm when needed
22. Which 3 out of the 4 macromolecules can be polymers?
a. carbohydrates
b. proteins
c. nucleic acids
d. lipids
23. If a DNA molecule of 200 bases (100 base pairs) contains 25 cytosine bases (C), how
many thymine (T) bases will it have?
a. 25
b. 50
c. 75
d. 100
24. The ________ of water gives rise to _______ bonds which allow for it to have many
unique characteristics.
a. non-polarity, ionic
b. polarity, ionic
c. polarity, hydrogen
d. non-polarity, hydrogen
25. What is a disaccharide?
a. many sugar monomers bonded together
b. 2 sugar monomers bonded together
c. the exoskeleton of arthropods
d. the protein responsible for making sugars
26. Triglycerides consist of:
a. 2 fatty acids and 1 glycerol
b. 3 fatty acids and 2 glycerols
c. 3 fatty acids and 3 glycerols
d. 3 fatty acids and 1 glycerol
27. What determines the characteristics between the 3types of polysaccharides we learn?
a. The element composition
b. The type of sugar
c. The amount of branching
d. The side group (R group)
28. Hydrolysis
a. breaks molecules apart
b. adds nitrogen to the molecule
c. has no effect on molecules
d. puts molecules back together
29. A free radical
a. Is an atom that donates electrons to other atoms
b. Is an atom with unequal number neutrons and protons
c. Is an atom with one unpaired electron in its outer shell
d. Is an atoms that doesn’t cause any damage to a cell
30. A reaction that involves the combination of two molecules while creating water is
a. Condensation/ dehydrating
b. Hydrolysis
c. Catabolism
d. Metabolism
31. What was the conclusion that Rutherford made from his experiment?
a. Because most of the alpha particles passed through the gold sheet an atom’s
nucleus is large and composed of positive charge
b. Since most of the alpha particles pass through the gold sheet an atom’s nucleus
must be negatively charged
c. Because most of the alpha particles bounced back from the gold sheet an atom’s
nucleus must be very small and positively charged
d. Since most of the alpha particles passed through the gold sheet an atom’s nucleus
is very small and composed of positive charge.
32. Adam LOVES mountain dew and cause he LOVES it soooo much he often over fills his
glass and the Mt. Dew bulges over the top yet doesn’t spill over, why is this?
a. Adhesion
b. Cohesion
c. A miracle for Adam so he can have more!
d. Collegative property
33. What is the storage polysaccharide commonly found in animals?
a. Cellulose
b. Lipids
c. Glycogen
d. Starch
34. Match this DNA strain with its complementary pair: AGCAGTGCCAGTTA
a. TGCTCACGGAGGAA
b. UCGUCACGGUCAAU
c. TCGTCACGGTCAAT
d. IDONOTKNOWWTF
35. Which type of isomer contains the same atoms but in different bonding relationships
a. Steroisomer
b. Enatiomer
c. Structural
d. Cis/Trans
36. Which of the following of fats is false
a. Saturated fats are solids at room temperature
b. Unsaturated fats are liquids at room temperature
c. Saturated fats come mostly from animals
d. Unsaturated fats have a linear structure because less hindrance from hydrogens.
37. Which structure of protein is a linear chain of amino acids?
a. Primary
b. Secondary
c. Tertiary
d. Quaternary
38. Which polysaccharide has the lowest amount of branching?
a. Glycogen
b. Cellulose
c. Starch
39. Adenine bond with
a. Guanine by two hydrogen bonds
b. Thymine by two hydrogen bonds
c. Cytosine by three hydrogen bonds
d. Thymine by three hydrogen bonds
40. Site of detoxification and lipid synthesis, as well as a Ca ion storage
a. Nucleus
b. RER
c. SER
d. Golgi App
41. The central vacuole in many plant cells is important for
a. Storage
b. Photosynthesis
c. Structural support
d. A and C *
e. A and B
42. Which region is a major site of chemical reactions?
a. Mitochondria
b. Cytosol
c. Cell membrane
d. Nucleus
43. The side of the golgi that faces the cytoplasm is termed?
a. Far side
b. Cis side
c. Trans side
d. Lateral side
44. The process of a cell expelling materials out of the cell is termed?
a. Endocytosis
b. Exocytosis
c. Metabolism
d. Pinocytosis
45. Which of the following observations would not be considered evidence for the
endosymbiosis theory?
a. Mitochondria and chloroplasts have genomes that resemble smaller versions of
bacterial genomes
b. Mitochondria, chloroplasts, and bacteria all divide by binary fission
c. Mitochondria, chloroplasts and bacteria all have ribosome *
d. Mitochondria, chloroplasts, and bacteria have similar sizes and shapes.
46. What are the relative strength of the following types of bonds
a. Van der Waals> covalent> hydrogen
b. Covalent>Van der Waals> hydrogen
c. Covalent>hydrogen>Van der Waals
d. Hydrogen>Covalent> Van der Waals
47. From Palade’s experiment, he determined that cells expel material by a particular
intracellular pathway, what would you expect to see if you looked at his sample 5
minutes after the chase (5 min=the very first sample he had)?
a. The radioactive label lecuine would be in the cytosol, since that is where many
chemical reactions take place.
b. The radioactive labeled lecuine would in vesicles right next to the membrane,
because the proteins just got into the cell.
c. The radioactive labeled lecuine would be present inside of the Endoplasmic
Reticulum
d. The radioactive labeled lecuine would be present inside of the Golgi Apparatus.
48. Chemical reactions in living organisms
a. Require energy to begin
b. Usually require a catalyst to speed up the process
c. Are usually reversible
d. Occur in liquid environments (like water)
e. All the above
f. Only A,B, and D
49. The formation of a triglyceride requires how many dehydration reactions?
a. 1
b. 2
c. 3
d. None, fatty acids are bonded to glycerol by hydrolysis reactions.
50. The 20 amino acids found in living organism differ by their R group properties, which of
the following properties does not contribute to the difference of the proteins. (2 answers)
a. Nonpolar
b. Nonpolar charged
c. Nonpolar uncharged
d. Polar charged
e. Polar uncharge