EXAMS Flashcards
Which of the following organism causes syphylis among infected people:
Treponema pallidum
The English Scientist reported to the world that smallest structural units of animals and plants are composed of “little boxes”. Later, the discovery by this scientist brought the theory that all living organisms are composed of “cells”.
Robert Hooke
The function of fimbriae in bacteria is:
To help some bacteria attach to surfaces (host cells)
One of the following bacterium is a rod-shaped that causes undulating fever among infected people.
Brucella abortus
A structure found in eucaryotic cells but not in procaryotic cells is:
Mitochondrial structure
Which of the following pair is mismatched:
Robert Koch ——– Aseptic surgery
Atomic mass (weight) of an atom is one of the following
Sum of protons and neutrons of an atom
High temperature inhibit enzymes by:
Denaturing enzyme activity
The ability to distinguish between two adjacent points with a microscope is called:
resolving power
ex of a monosaccharide molecule:
mannose
galactose
glucose
fructose
Which of the following enzyme is involved in removing NH2 or amino group from a substrate:
deaminase
true or false: A nucleotide consists of a purine or pyrimidine nitrogen base, a ribose or deoxyribose sugar, and a phosphate
true
thiamine nitrogen base is a—— present mostly in —–:
pyrimidine/DNA
The kingdom Protista consists of:
Protozoa, slime mold and algae
Eight cocci arranged into a cubical packet are called;
sarcinae
Which of the following enzyme is involved in synthetic reaction among microorganisms:
ligase
true or false: All enzymes are proteins but not all proteins are enzymes
true
The compound found in the cell wall of gram positive but not gram negative bacteria:
teichoic acids
Which group of microorganisms would least likely to contain species that could cause diseases in humans:
algae
Boiling surgical instruments was a common practice in the early 1800s for reducing infection and it was suggested for the first time by an English Scientist called :
Lister
The organism involved in a disease called “deadly plague” is one of the following:
Yersinia pestis
Vitamin B2 used as a coenzyme is one of the following:
riboflavin
One of the following scientist was the first to report the tobacco mosaic viruses from infected plants and he was the first to report viruses as a cause of disease.
iwanoski
Louis Pasteur and John Tyndall worked together to:
Disapprove the theory of spontaneous generation
thylakoids membrane in green bacteria and cyanobacteria are found in:
chloroplast
Which of the following organism is helicoidal in shape and form:
Treponema pallidum
Are located on rough endoplasmic reticulum inside the living cells of eucaryotic and are important in protein synthesis:
rRNA
Which of the following organism is ellipsoidal (spherical) in form and shape
Staphylococcus aureus
High concentration of dipicolinic acid and calcium are unique to what bacterial structure:
endospore
Which of the following compound is a disaccharide molecule:
maltose
One of the following scientist was the first to develop condenser for microscope and also a technique for using oil immersion objective that is the most effective objective to identify microscopic organisms.
abbe
Phospholipids are complex lipids important in concentration of:
plasma mmb
Which of the following antibiotic inhibits peptidoglycan synthesis in the cell wall of bacteria:
penicillin
the term peritrichous refers to a bacterium with:
Flagella protruding from all areas of a bacterium
Spiral bacteria that are short and do not form complete coils are called;
vibrios
Arginine, serine, alanine, histidine, glycine, lysine, cysteine, tyrosine, valine and leucine all are:
aa
Which of the following is probably true about all the experiments hat proved spontaneous generation:
Microorganisms were already present
The resolving power of the compound brightfield microscope is:
0.2 um
A scanning electron microscope uses which of the folowing sources of illumination:
Source of electron
All of the following except one are biologically important hexoses:
ribose
true or false:
Endospores allow a cell to survive environmental changes
true
true or false: viruses cannot metabolize nutrients
true
true or false: viruses are not composed of cells
true
true or false: viruses cannot reproduce by themselves
true
true or false: viruses have DNA or RNA, not both
true
Two long strands of DNA nucleotides are held together by matched-pair of nitrogen bases of:
A-T, G-C
Included in subkingdom eucaryotes:
protozoa
Magnification of 100,000 or more can be obtained by using a:
Electron microscope
true or false: bacterial Endospores are metabolically active
false
in addition to magnifying an image, microscope objectives;
Focus the light rays coming from the specimen being viewed
Spiral bacteria that are short and do not form complete coils are called:
vibrios
He was the first who divided bacteria regarding to the absence or presence of endospores into two major groups: vegetative or active forms and sleeping or dormant forms.
cohn
Which of the following nitrogen base is not found in DNA molecule of a bacterial cell:
uracil
Which of the following scientist was able to transfer Bacillus antheracis from cattle to mice:
koch
When bacteria are in solution of low ion concentration, they are prevented from bursting due to osmotic pressure because of the presence of the:
cell wall
which of the following organism is cylindrica (rod-shaped) in form and shaped:
Bacillus megaterium
true or false: Triglycerides are esters of glycerol and fatty acids
true
true or false:
Lipids are basically esters of fatty acids
true
true or false: Triglycerides are esters of glycerol and fatty acids
true
true or false: Phospholipids are the major components of cytoplasmic membrane of bacteria
true
true or false: Lipids form complexes with polysaccharides (LPS) and are a major component of the cell wall of bacteria
true
Which of the following contains five carbons in its chemical structure:
ribose
Dense, external coats of polysaccharide and polypeptide are referred to a structure of bacterium called:
capsule
One of the following German Scientist studied the life cycle of anthrax bacillus and he used anthrax as a model to demonstrate that specific microorganisms are the cause of specific diseases
koch
Many bacteria contain an invaginated and highly convoluted section of cytoplasmic membrane called the:
mesosome
Scanning electron microscope uses which of the following sources of illumination:
electron
He was the first to discover the antimicrobial activity of products released by a mold called Penicillium notatum. He called this product penicillin.
flemming
