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50 multiple-choice questions about Cell Molecular Biology - with answers | BIOL 203, Exams of Biology

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:
1) Active transport __C___
2) Diffusion __A___
3) Facilitated diffusion __B___
4) 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
5) Which of the following molecules would likely move directly through the lipid bilayer of a plasma membrane?
A) CO2
B) steroids
C) O2
D) some water molecules
E) all of the above
6) 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:
7) Hypertonic solution __C___
8) Hypotonic solution __A___
9) 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
10) 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
11) 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
OH
2
OH
2
OH
2
O
AB C
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pf5
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Download 50 multiple-choice questions about Cell Molecular Biology - with answers | BIOL 203 and more Exams Biology in PDF only on Docsity!

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:

  1. Active transport C_

  2. Diffusion A_

  3. Facilitated diffusion B_

  4. 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

  5. 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

  6. 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:

  1. Hypertonic solution C_

  2. Hypotonic solution A_

  3. 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

  4. 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

  5. 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

A B C

Signaling molecule

Receptor

C

A

ATP

Enzymes

Glyco- protein

B

D E

Match the following major functions of membrane proteins in the figure to the right:

  1. Cell-cell recognition D_

  2. Transport A_

  3. Signal Transduction C_

  4. 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

  5. Substrate level phosphorylation of ATP occurs during A) glycolysis B) electron transport C) chemiosmosis D) all of the above E) none of the above

  6. 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

  7. 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

  1. Many aspects of cell signaling are conserved from yeast to human, going back one billion years. This is relevant because: A) yeast and humans are both multicellular eukaryotes B) cell signaling is only important in a few organisms, including yeast and humans C) cell signaling is highly important because itโ€™s evolutionarily conserved D) cell signaling is not very complex, so both yeast and humans use it E) none of the above

Match the following molecules or terms in the figure to the right:

  1. electron transport chain C_

21) NADH A_

  1. oxidative phosphorylation E_

  2. 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™ ฮ™ฮ™

ฮ™ฮ™ฮ™

ฮ™ V

B

A

(carrying electrons from food)

C

2 H+^ + 1 / 2 O 2 H 2 O

ADP + (^) P (^) i

D

E

H+

H+

ATP

Match the following terms in the figure to the right:

  1. Carbon fixation B_

  2. Regeneration of the C0 2 acceptor E_

  3. Rubisco A_

  4. Synthesis of sugar molecule D_

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

A

B

C

D

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:

  1. metaphase C_

  2. anaphase D_

  3. 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