EXAMS

Question 1

Which of the following organism causes syphylis among infected people:

Answer 1

Treponema pallidum

Question 2

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”.

Answer 2

Robert Hooke

Question 3

The function of fimbriae in bacteria is:

Answer 3

To help some bacteria attach to surfaces (host cells)

Question 4

One of the following bacterium is a rod-shaped that causes undulating fever among infected people.

Answer 4

Brucella abortus

Question 5

A structure found in eucaryotic cells but not in procaryotic cells is:

Answer 5

Mitochondrial structure

Question 6

Which of the following pair is mismatched:

Answer 6

Robert Koch ——– Aseptic surgery

Question 7

Atomic mass (weight) of an atom is one of the following

Answer 7

Sum of protons and neutrons of an atom

Question 8

High temperature inhibit enzymes by:

Answer 8

Denaturing enzyme activity

Question 9

The ability to distinguish between two adjacent points with a microscope is called:

Answer 9

resolving power

Question 10

ex of a monosaccharide molecule:

Answer 10

mannose
galactose
glucose
fructose

Question 11

Which of the following enzyme is involved in removing NH2 or amino group from a substrate:

Answer 11

deaminase

Question 12

true or false: A nucleotide consists of a purine or pyrimidine nitrogen base, a ribose or deoxyribose sugar, and a phosphate

Answer 12

true

Question 13

thiamine nitrogen base is a—— present mostly in —–:

Answer 13

pyrimidine/DNA

Question 14

The kingdom Protista consists of:

Answer 14

Protozoa, slime mold and algae

Question 15

Eight cocci arranged into a cubical packet are called;

Answer 15

sarcinae

Question 16

Which of the following enzyme is involved in synthetic reaction among microorganisms:

Answer 16

ligase

Question 17

true or false: All enzymes are proteins but not all proteins are enzymes

Answer 17

true

Question 18

The compound found in the cell wall of gram positive but not gram negative bacteria:

Answer 18

teichoic acids

Question 19

Which group of microorganisms would least likely to contain species that could cause diseases in humans:

Answer 19

algae

Question 20

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 :

Answer 20

Lister

Question 21

The organism involved in a disease called “deadly plague” is one of the following:

Answer 21

Yersinia pestis

Question 22

Vitamin B2 used as a coenzyme is one of the following:

Answer 22

riboflavin

Question 23

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.

Answer 23

iwanoski

Question 24

Louis Pasteur and John Tyndall worked together to:

Answer 24

Disapprove the theory of spontaneous generation

Question 25

thylakoids membrane in green bacteria and cyanobacteria are found in:

Answer 25

chloroplast

Question 26

Which of the following organism is helicoidal in shape and form:

Answer 26

Treponema pallidum

Question 27

Are located on rough endoplasmic reticulum inside the living cells of eucaryotic and are important in protein synthesis:

Answer 27

rRNA

Question 28

Which of the following organism is ellipsoidal (spherical) in form and shape

Answer 28

Staphylococcus aureus

Question 29

High concentration of dipicolinic acid and calcium are unique to what bacterial structure:

Answer 29

endospore

Question 30

Which of the following compound is a disaccharide molecule:

Answer 30

maltose

Question 31

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.

Answer 31

abbe

Question 32

Phospholipids are complex lipids important in concentration of:

Answer 32

plasma mmb

Question 33

Which of the following antibiotic inhibits peptidoglycan synthesis in the cell wall of bacteria:

Answer 33

penicillin

Question 34

the term peritrichous refers to a bacterium with:

Answer 34

Flagella protruding from all areas of a bacterium

Question 35

Spiral bacteria that are short and do not form complete coils are called;

Answer 35

vibrios

Question 36

Arginine, serine, alanine, histidine, glycine, lysine, cysteine, tyrosine, valine and leucine all are:

Answer 36

aa

Question 37

Which of the following is probably true about all the experiments hat proved spontaneous generation:

Answer 37

Microorganisms were already present

Question 38

The resolving power of the compound brightfield microscope is:

Answer 38

0.2 um

Question 39

A scanning electron microscope uses which of the folowing sources of illumination:

Answer 39

Source of electron

Question 40

All of the following except one are biologically important hexoses:

Answer 40

ribose

Question 41

true or false: | Endospores allow a cell to survive environmental changes

Answer 41

true

Question 42

true or false: viruses cannot metabolize nutrients

Answer 42

true

Question 43

true or false: viruses are not composed of cells

Answer 43

true

Question 44

true or false: viruses cannot reproduce by themselves

Answer 44

true

Question 45

true or false: viruses have DNA or RNA, not both

Answer 45

true

Question 46

Two long strands of DNA nucleotides are held together by matched-pair of nitrogen bases of:

Answer 46

A-T, G-C

Question 47

Included in subkingdom eucaryotes:

Answer 47

protozoa

Question 48

Magnification of 100,000 or more can be obtained by using a:

Answer 48

Electron microscope

Question 49

true or false: bacterial Endospores are metabolically active

Answer 49

false

Question 50

in addition to magnifying an image, microscope objectives;

Answer 50

Focus the light rays coming from the specimen being viewed

Question 51

Spiral bacteria that are short and do not form complete coils are called:

Answer 51

vibrios

Question 52

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.

Answer 52

cohn

Question 53

Which of the following nitrogen base is not found in DNA molecule of a bacterial cell:

Answer 53

uracil

Question 54

Which of the following scientist was able to transfer Bacillus antheracis from cattle to mice:

Answer 54

koch

Question 55

When bacteria are in solution of low ion concentration, they are prevented from bursting due to osmotic pressure because of the presence of the:

Answer 55

cell wall

Question 56

which of the following organism is cylindrica (rod-shaped) in form and shaped:

Answer 56

Bacillus megaterium

Question 57

true or false: Triglycerides are esters of glycerol and fatty acids

Answer 57

true

Question 58

true or false: | Lipids are basically esters of fatty acids

Answer 58

true

Question 59

true or false: Triglycerides are esters of glycerol and fatty acids

Answer 59

true

Question 60

true or false: Phospholipids are the major components of cytoplasmic membrane of bacteria

Answer 60

true

Question 61

true or false: Lipids form complexes with polysaccharides (LPS) and are a major component of the cell wall of bacteria

Answer 61

true

Question 62

Which of the following contains five carbons in its chemical structure:

Answer 62

ribose

Question 63

Dense, external coats of polysaccharide and polypeptide are referred to a structure of bacterium called:

Answer 63

capsule

Question 64

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

Answer 64

koch

Question 65

Many bacteria contain an invaginated and highly convoluted section of cytoplasmic membrane called the:

Answer 65

mesosome

Question 66

Scanning electron microscope uses which of the following sources of illumination:

Answer 66

electron

Question 67

He was the first to discover the antimicrobial activity of products released by a mold called Penicillium notatum. He called this product penicillin.

Answer 67

flemming