YTU- BIOENGINEERING DEPARTMENT
BYM1122- INTRODUCTION TO MODERN BIOLOGY
SPRING – 2013- 04-07-----MONDAY
BYM1122 Quiz 1
ANSWER KEY
MONDAY
Name-Surname
………………………………..
Number
………………………
Sign
………………………
A-
MULTIPLE-CHOICE QUESTION-(CIRCLE THE CORRECT ANSWER) (8 x 3 pts=24 pts)
1-The molecular formula for glucose is C6H12O6.
What would
be the molecular formula for a polymer made by
linking ten
glucose molecules together by dehydration
reactions?
a. C60H120O60
b. C6H12O6
c. C60H102O51
d. C60H100O50
e. C60H111O51
2-Which of the following categories includes all
others in the list?
a. monosaccharide
b. disaccharide
c. starch
a) ice has more water molecules
b) ice has greater densitiy
c) Water has more H bonds
d) Ice is heavier than water
e) Ice has more regular H bonds
7 - An enzymatic pathway in a cell is shown
below.
d. carbohydrate
e. polysaccharide
3-The light reactions of photosynthesis supply the
Calvin cycle with;
If a mutation ocur in the gene which is
responsible for enzyme E3 production .Which of
the below will accumulate in the environment?
a)
b)
c)
d)
e)
a. light energy.
b. CO2 and ATP.
c. H2O and NADPH.
d. ATP and NADP
e. Sugar and O2
4-The final electron acceptor of the electron
transport chain
that functions in aerobic oxidative
phosphorylation is
a. oxygen.
b. water.
c. NAD--...
6 - Which of the following is true for equal
volumes of water and ice?
d. pyruvate
e. ADP
5-Most CO2 from catabolism is released during
a. glycolysis.
b. the citric acid cycle
c. lactate fermentation.
d. electron transport.
e. oxidative phosphorylation.
A
A ve B
C
D
E
8-Which of the followings is not a property of
water that facilitate an environment for life?
a)
b)
c)
d)
e)
Cohesive behavior
Storing insoluble ions
Ability to moderate temperature
Expansion upon freezing
Versatility as a solvent
B- FILL IN THE BLANKS WITH THE CORRECT WORD OR WORDS (13 x 2 pts=26 pts)
1. Cellular respiration has three stages:
.... Glycolysis..................... (breaks down glucose into two molecules of pyruvate)
…… The citric acid cycle ……. (completes the breakdown of glucose)
…… Oxidative phosphorylation … (accounts for most of the ATP synthesis)
2. Two common types of fermentation are …… alcohol fermentation and …… lactic acid .
fermentation. ( 2 x 1 pts =2 pts)
3. Each nucleotide generally consists of a …… nitrogenous base ….., a … pentose sugar., and a …
phosphate group
4. Conformation of a protein can affected with physical and chemical conditions for example pH, salt
concentration, temperature, or other environmental factors. This loss of a protein’s native
conformation is called ………denaturation………………………..
5. Many biological processes are self-regulating: the product regulates the process itself.
……positive feedback., the accumulation of a product accelerates the process itself.
6. … Reductionism is reducing complex systems to simpler components that are easier to study. The
studies of DNA structure and the Human Genome Project are examples.
7. … Hyphothesis . is a tentative answer to a well-framed question. It must have two important
qualities: testable and falsifiable
8. ...Covalent bond..is the sharing of a pair of valence electrons by two atoms. In this bond, the shared
electrons count as part of each atom’s valence shell. Example of this bond is CH4.
9. The internal pH of most living cells must remain close to pH 7. …Buffers are substances that
minimize changes in concentrations of H+ and OH- in a solution.
C- GIVE THE SHORT ANSWER TO THE FOLLOWING QUESTIONS
(50 pts)
1. Functional groups are the components of organic molecules that are most commonly involved in
chemical reactions. The six functional groups that are most important in the chemistry of life.
Match the name and formula of these functional groups. (6 x 2 pts= 12 pts)
Hydroxyl group(a),
Amino group (c),
a.
b.
Carbonyl group (e),
Carboxyl group (b),
Sulfhydryl group (d),
c.
d.
Phosphate group (f)
e.
f.
2. Which macromolecules are polymers? Please write the names . (3 x 2 pts = 6 pts)
a. ………… Polysaccharides ……………..
c ………… Nucleic acids ……………..
b. ………… Proteins ……………………..
3. Please write the names and chemical formula of following monosaccharide structures. (4 x 1 pt=4 pts)
Name :
…… Glyceraldehyde.
Formula:
………… C3H6O3………..
4. What is called the event described in the following figure. ( 3 pts)
…………………Hydrolyses…………………………
…Ribose……….
… C5H10O5….
5. What kind of inhibition is shown in the figure below? (5 pts)
Substrate
Enzyme active site
Enzyme
Matter binds an altering site of enzyme
…………Nonconpetitive inhibition……………….
6. The following figure summarizes photosynthesis. Please write names of the molecules with the
numbers on given figure below. (4 x 3 pts=12 pts)
1………… H2O… (Water)………...
1
3
2………… O2……………………
3…………… C2O ……………
4…………… C6H12O6 …………
2
4
7. Please write names of the amino acid monomer groups on following figure. (4 x 2 pts=8 pts)
…Functional (Radical) group……………….
…………………Central Carbon atom…………
…Carboxyle group………..
…………Amine group…………….