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BIOL 2261
Exam 1
50 Questions: Marks 100 ( 2 points each)
Name _______________
Choose the Correct answer for each question and place all answers on the scantron sheet.
.Which of the following distinguish the field of microbiology from other fields of biology?
A. The size of the organism studied
B. The techniques used to study organisms regardless of their size
C. Both the size of the organism studied and the techniques employed in the study of organisms
D. Neither the size of the organism studied nor the techniques employed in the study of organisms regardless of their size
. Unlike other organisms, most microorganisms are too small
A. To be found in the environment
B. To be able to reproduce
C. To affect other forms of life
D. All of the above
E. None of the above
. Fungi are considered as prokaryortes
A. True
B. False
.…………...provided the evidence needed to discredit the concept of spontaneous generation?
A. Redi
B. Needham
C. Pasteur
D. Spallanzani
. In Pasteur’s swan neck flask,
A.
B.
C.
D.
E.
The neck was to allow air from the atmosphere
No growth occurred because germs and dust were trapped on the walls of the neck
The boiled beef broth forms life
Two of the above
None of the above
. Which of the following pairs is matched?
A.
B.
C.
D.
E.
Coccus – curved
Diplobacilli – single rod-like cell
Staphylo – spiral
Strepto – in chain
None of the above
. Prokaryotes do NOT have
A.
B.
C.
D.
E.
Cell membrane
Nucleus
Cytoplasm
Ribosomes
Two of the above
. The periplasmic space ………….
A. is found only in Gram-positive bacteria
B. is located between the plasma membrane and outer membrane of Gram-negative bacteria
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C. contains hydrolytic enzymes and binding proteins involved in nutrient acquisition
D. Both B and C
. The plasma or inner membrane is more essential to the prokaryotic cell than the cell wall.
A. True
B. False
. Gram positive cell walls usually contains large amounts of……………..
A. Exotoxin
B. Teichoic acid
C. Endotoxin
D. phospholipid
. Which of the following is correct?
A.
B.
C.
D.
escherichia coli
escherichia Coli
Escherichia coli
Escherichia Coli
. Phospholipid molecule has…………
A.
B.
C.
D.
E.
Polar head
Hydrophilic end
Hydrophobic end
Two of the above
None of the above
. Which of the following is a function of bacterial cell wall?
A.
B.
C.
D.
E.
Provide mechanical strength
Define cell shape
Protect against osmotic lysis
All of the above
None of the
. Some prokaryotes may have external structures such as capsules, pili or flagella.
A. True
B. False
. Bacterial chromosome is…………………..
A.
B.
C.
D.
E.
The genetic material
Made of one circular DNA molecule
In nucleoid
All of the above
None of the above
. Eukaryotes usually have more than one chromosome for the storage of genetic information.
A. True
B. False
. The size of a prokaryotic ribosome is ……………
A. 70S
B. 80S
C. 90S
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D. 100S
.The figure below represents the structure of a typical eukaryotic cell
a) True
b) False