YTU- BIOENGINEERING DEPARTMENT
BYM1122- INTRODUCTION TO MODERN BIOLOGY
SPRING – 2013- 04-04
BYM1122 Quiz 1
ANSWER KEY
FRIDAY
Name-Surname
………………………………..
Number
………………………
Sign
………………………
A- MULTIPLE-CHOICE QUESTION-(CIRCLE THE CORRECT ANSWER) (8 X 4 pts=32 pts)
1 – During photsynthesis for which of the
following light energy is used for?
a) to produce ATP and NADPH
b) to bind CO2 to organic molecules
c) to produce glucose
d) to synthesise starch from glucose
e) to break down glucose
2 – In which of the organelle photosynthesis takes
place in plant cells?
a) Mitochondria
b) Chloroplast
c) Golgi
d) Lysosome
e) Vacuole
3 - Production of ATP across a membrane
depending on H + ion gradient is called……
a) photophosphorylation
b) phosphorylation chemosynthetic
c) chemiosmotic theory
d) substrate level phosphorylation
e) Cyclic photophosphorylation
4 – At the end of light dependent reactions of
photosynthesis , which of the followings are
produced?
I-O2
II-ATP
III-NADPH
IV-Glucose
a) I ve II
b) II ve III
c) III ve IV
d) I, II ve III
e) II, III ve IV
5 – Which of the following molecule is produced
in human skeletal muscle cells results in a feeling
of tiredness?
a) pyruvate
b) Glucose
c) Carbon dioxide
d) Lactic acid
e) Ethyl alcohol
6 - Which of the following is true for equal
volumes of water and ice?
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.
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
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 (11 X 2 pts= 22 pts)
1. Two main types of cells:
..Eukaryotik....... cells have organelles; DNA in nucleus. …Prokaryotic…cells lack organelles;
DNA is not separated in a nucleus.
2. 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.
3. Many biological processes are self-regulating: the product regulates the process itself.
……Negative feedback, the accumulation of a product slows down the process itself.
4. … Hyphothesis .. is a tentative answer to a well-framed question. It must have two important
qualities: testable and falsifiable
5. In …ionic bond.., atoms strip electrons from their bonding partners. An example is the transfer of an
electron from sodium to chlorine (NaCl). After the transfer of an electron, both atoms have charges.
6. Molecules or atoms that are very close together can be attracted by fleeting charge differences.
These weak attractions are called …Van der waals interactions . Such interactions can be strong, as
between molecules of a gecko’s (is a kind of lizard) toe hairs and a wall surface.
7. 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.
8. Isomers are compounds with the same molecular formula but different structures and properties.
… Structural isomers have different covalent arrangements of their atoms
… Geometric . isomers have the same covalent arrangements but differ in spatial arrangements
…Enantiomers.. are isomers that are mirror images of each other also are important in the
pharmaceutical industry . Two compounds of this kind of isomer of a drug may have different
effects.
C- GIVE THE SHORT ANSWER TO THE FOLLOWING QUESTIONS (45 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.
c.
Carbonyl group (e),
Carboxyl group (b),
Sulfhydryl group (d),
Phosphate group (f)
d.
e.
f.
2. Which macromolecules are polymers? Please write the names . (3 x 2 pts = 6 pts)
a. ………… Polysaccharides ……………..
b. ………… Proteins ……………………..
c. ………… Nucleic acids ……………..
3. Please write the names and chemical formula of following monosaccharide structures.
(6 x 1 pt=6 pts)
Name
: … Galactose…
Formula: …… C6H12O6………
………Fructose…….
… C6H12O6.
………Glucose. …
… C6H12O6……
4. Which even is described in the following figure? ( 4 pts)
…… DEHYDRATION REACTION ……
5. What kind of inhibition is shown in the figure below? (5 pts)
Substrate
This matter mimics the substrate
Enzyme active site
Enzyme
………… Conpetitive inhibitor …….
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