1
BIOL 2261 Name ______
Exam 1
50 Questions: Marks 100 ( 2 points each)
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
- 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. The neck was to allow air from the atmosphere
B. No growth occurred because germs and dust were trapped on the walls of the neck
C. The boiled beef broth forms life
D. Two of the above
E. None of the above
.Which of the following pairs is matched?
A. Coccus – curved
B. Diplobacilli – single rod-like cell
C. Staphylo – spiral
D. Strepto – in chain
E. None of the above
.Prokaryotes do NOT have
A. Cell membrane
B. Nucleus
C. Cytoplasm
D. Ribosomes
E. 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
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. escherichia coli
B. escherichia Coli
C. Escherichia coli
D. Escherichia Coli
. Phospholipid molecule has…………
A. Polar head
B. Hydrophilic end
C. Hydrophobic end
D. Two of the above
E. None of the above
. Which of the following is a function of bacterial cell wall?
A. Provide mechanical strength
B. Define cell shape
C. Protect against osmotic lysis
D. All of the above
E. None of the
.Some prokaryotes may have external structures such as capsules, pili or flagella.
A. True B. False
. Bacterial chromosome is…………………..
A. The genetic material
B. Made of one circular DNA molecule
C. In nucleoid
D. All of the above
E. 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
D. 100S
.The figure below represents the structure of a typical eukaryotic cell
a)True
b)False