Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
Which of the following characteristics make microbes excellent model systems for experimentation? A. Fast generation times means numerous offspring in a short period of time B. Some microbes are easy to culture in the laboratory C. Microbial genomes are smaller and easier to manipulate D. Enzymes are useful in biotechnological/ industrial settings E. All of the above are correct |
E. All of the above are correct |
|
|
Which of the following is not a characteristic that distinguishes living organisms from nonliving? A. DNA as the genetic material B. Metabolism C. Growth D. Reproduction |
A. DNA as the genetic material |
|
|
Evidence that mitochondria and chloroplasts are derived from bacteria is A. the presence of their own DNA B. the presence of their own protein synthesizing machinery C. similar 16S rRNA gene sequences D. all of these choices |
D. All of these choices |
|
|
Bacteria have extra chromosomal pieces of DNA in the cytoplasm called A. plasmids B. inclusion bodies C. carboxysomes D. nucleoids |
A. Plasmids |
|
|
Which of the following characteristics are used to classify bacteria? A. Cell morphology B. Gram stain reaction C. Metabolism D. All of these choices E. None of these choices |
D. All of these choices |
|
|
Which of the following is not a correct statement? A. Capsules are found only in Gram positive bacteria B. Flagella are found on both Gram positive and Gram negative bacteria C. LPS are found only on Gram negative bacteria D. S layers are found on both Gram positive and Gram negative bacteria E. All of these statements are correct |
A. Capsules are found only in gram positive bacteria |
|
|
A major difference between Gram positive and Gram negative cell walls is the presence of: A. peptidoglycan in Gram positive walls B. lipopolysaccharides in Gram negative walls C. periplasm in Gram positive walls D. teichoic acids in Gram negative walls |
B. Lipopolysaccharides in Gram negative walls |
|
|
Bacterial cell walls are composed of __________, algal cell walls are composed of __________, and fungal cell walls are usually composed of __________. A. chitin; peptidoglycan; cellulose B. cellulose; chitin; peptidoglycan C. peptidoglycan; cellulose; chitin D. cellulose; peptidoglycan; chitin |
C. Peptidoglycan; cellulose; chitin |
|
|
Which of the following is evidence supporting the theory of endosymbiosis? A. The lipid composition of the endoplasmic reticulum and Golgi apparatus resembles the cytoplasmic membrane of bacterial cells B. Eukaryal cells are always larger than bacterial cells C. Mitochondria and chloroplasts have their own DNA and protein synthesizing machinery D. All of these choices |
C. Mitochondria and chloroplasts have their own DNA and protein synthesizing machinery |
|
|
Which of the following is a structural adaptation for life at high temperatures? A. Lipid monolayers instead of bilayers B. Ether linkages instead of ester linkages C. Isoprenoids instead of fatty acids D. All of these choices |
A. Lipid monolayers instead of bilayers |
|
|
Most Crenarchaeota are thermophiles or hyperthermophiles. A. True B. False |
A. True |
|
|
Heterotrophic organisms A. obtain carbon from organic sources B. obtain energy from organic sources C. obtain electrons from organic sources D. obtain electrons from inorganic sources |
A. Obtain carbon from organic sources |
|
|
Term for a bacterium that does not use oxygen for growth, but will grow in the presence of oxygen: A. aerobe B. anaerobe C. aerotolerant anaerobe D. facultative anaerobe E. facultative aerobe |
C. Aerotolerant anaerobe |
|
|
Term for microbes that grow optimally at a pH above 8.5: A. Acidophiles B. Alkalophiles C. Barophiles D. Psychrophiles E. Halophiles |
C. Barophiles |
|
|
Which one of the following elements is considered a micronutrient, usually required in small amounts? A. Phosphorus B. Nitrogen C. Carbon D. Manganese E. Oxygen |
D. Manganese |
|
|
Which is the best definition of an antiseptic? A. A chemical agent that is applied to hospital equipment to kill or inhibit microbes B. A chemical agent that is applied to living tissue to kill and inhibit microbes C. An antibiotic that is applied to living tissue D. A physical agent that is used to sterilize hospital equipment E. A physical agent that is used on human tissue to inhibit microbial growth |
B. A chemical agent that is applied to living tissue to kill and inhibit microbes |
|
|
During the stationary phase of the bacterial growth curve, the number of cells being produced is equal to the number of cells dying. A. True B. False |
A. True |
