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Exam 2 Bio 203 Material Type: Exam; Professor: Feuer; Class: PRINC CELL MOLECULAR BIOL; Subject: Biological Sciences; University: San Diego State University; Term: Spring 2013;
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Student Name: _______________________________ BIOL 203 Fall 2012 RED ID:____________________________________
EXAM II Version A
MULTIPLE CHOICE QUESTIONS (100 points total): For each of the following numbered questions, mark the most appropriate answer. The following questions are worth 2 points each. Please mark the answer on the exam sheet and the Parscore test form. Please put your name and RED ID on the exam sheet (above) and Parscore test form. Please mark the Version of Exam I on your Parscore test form.
Match the following transport mechanisms in the figure to the right:
Active transport C_
Diffusion A_
Facilitated diffusion B_
The following mechanisms of endocytosis are utilized by cells: A) receptor-mediated endocytosis B) phagocytosis C) pinocytosis D) all of the above E) none of the above
Which of the following molecules would likely move directly through the lipid bilayer of a plasma membrane? A) CO (^2) B) steroids C) O 2 D) some water molecules E) all of the above
The presence of cholesterol in the plasma membranes of some animals A) enables the animal to remove hydrogen atoms from saturated phospholipids B) enables the animal to add hydrogen atoms to unsaturated phospholipids C) makes the membrane less flexible, allowing it to sustain greater pressure from within the cell D) makes the animal more susceptible to circulatory disorders E) reduces membrane fluidity at moderate (37ยฐC) temperatures
Match the following conditions in the figure to the right:
Hypertonic solution C_
Hypotonic solution A_
The key enzyme which regulates glycolysis through allosteric binding of ATP and its products is: A) hexokinase B) ATP synthase C) rubisco D) coenzyme A E) none of the above
Energy in the form of ATP is initially invested during A) glycolysis B) oxidative phosphorylation C) alcohol fermentation D) lactic acid fermentation E) citric acid cycle
Phosphorylation of glucose during the first step of glycolysis A) traps the sugar molecule in the cell B) makes glucose less chemically reactive C) is carried out by the enzyme phosphofructokinase D) all of the above E) none of the above
H 2 O H 2 O H 2 O H 2 O
Signaling molecule
Receptor
ATP
Enzymes
Glyco- protein
Match the following major functions of membrane proteins in the figure to the right:
Cell-cell recognition D_
Transport A_
Signal Transduction C_
Which of the following occurs in the mitochondria of a eukaryotic cell? A) glycolysis B) fermentation C) Calvin cycle D) citric acid cycle E) none of the above
Substrate level phosphorylation of ATP occurs during A) glycolysis B) electron transport C) chemiosmosis D) all of the above E) none of the above
The following metabolic processes enable cells to produce ATP without the use of oxygen: A) chemiosmosis B) aerobic respiration C) oxidative phosphorylation D) fermentation E) none of the above
During aerobic respiration, electrons travel downhill in which sequence? A) glucose โ pyruvate โ ATP โ oxygen B) food โ NADH โ electron transport chain โ oxygen C) glucose โ ATP โ electron transport chain โ NADH D) food โ citric acid cycle โ ATP โ NAD
E) food โ glycolysis โ citric acid cycle โ NADH โ ATP
Match the following molecules or terms in the figure to the right:
oxidative phosphorylation E_
Which is an example of a non-protein signaling molecule? A) receptor tyrosine kinase B) calcium C) transcription factor D) all of the above E) none of the above
Protein complex of electron carriers
H+
H+
H+
Cyt c
Q ฮ ฮฮ
ฮฮฮ
ฮ V
(carrying electrons from food)
2 H+^ + 1 / 2 O 2 H 2 O
ADP + (^) P (^) i
H+
H+
ATP
Match the following terms in the figure to the right:
Carbon fixation B_
Regeneration of the C0 2 acceptor E_
Rubisco A_
Synthesis of sugar molecule D_
The following receptor is activated following the binding of a ligand and subsequent dimerization: A) receptor tyrosine kinase B) G protein-coupled receptor C) ion channel receptor D) adenylyl cyclase E) hormone receptor
An animal cell contains 20 picograms of DNA during G1 phase of the cell cycle. How much DNA does it contain during prophase? A) 5 picograms B) 10 picograms C) 20 picograms D) 40 picograms E) 80 picograms
Gene therapy is a possible new way to treat many diseases, including cancer, by turning genes back on. In cancer, a gene for which type of protein would you most likely want to turn back on? A) phosphatase protein B) transcription factor protein C) kinase protein D) intracellular receptor protein E) none of the above
A new disease is discovered that is due to lack of a type of growth factor being released into the extracellular fluid around the cell. What type of signaling is most likely impaired by this disease? A) betacrine B) paracrine C) intacrine D) endocrine E) angiotensin
Cohesins hold together sister chromatids during replication. At what stage of the mitotic cycle would you expect cohesins to be cleaved to allow mitosis to continue? A) prophase B) anaphase C) metaphase D) cytokinesis E) interphase
Match the following stages of G protein-coupled receptor signal transduction in the figure to the right:
_45) G protein coupled-receptor is activated __D____
_46) Activated G protein binds and activates enzyme __A____
_47) G protein hydrolyzes bound GTP and leaves enzyme __C____
Plasma membrane
GDP
CYTOPLASM
GDP GTP
GTP
GDP P (^) i
Ribulose bisphosphate (RuBP) 3-Phosphoglycerate
Short-lived intermediate
Phase 1
(Entering one at a time)
A
Input CO (^2)
P
3 6
3
3
P
P P P (^6) ATP 6 ADP
6 P P 1,3-Bisphosphoglycerate
(^6) P Glyceraldehyde-3-phosphate(G3P) Phase 2:
1 P
Calvin Cycle 3
3 ADP ATP
5 P
Phase 3:
G3P
B
C
E
D
Match the following stages of mitotic cellular division in the figure to the right:
metaphase C_
anaphase D_
Somatic cells from different tissues express different proteins, so the genome of these cells are different. A) True B) False
End
A B Early mitoticAster Centromere spindle
Chromatin (duplicated)
Centrosomes (with centriole pairs)
Nucleolus Nuclear envelope
Plasma membrane
Chromosome, consisting of two sister chromatids
C D^ E Cleavage furrow
Nucleolus forming
Centrosome at one spindle pole
Spindle
Daughter chromosomes
Nuclear envelope forming