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Question 1 1 / 1 point
Differences in what structure account for whether a bacterium is Gram-positive or Gram- negative? Flagellum Cytoplasmic membrane DNA Cell wall Ribosomes
Question 2 1 / 1 point
The enzyme responsible for ATP production during oxidative phosphorylation is known as cytochrome oxidase cytochrome b ATP synthase ATP synthetase Photosystem I
Question 3 1 / 1 point
A strain of Streptococcus pneumoniae is no longer able to synthesize its capsular polysaccharide What is a likely outcome?
It will produce more potent toxins which damage the host It will no longer be able to carry out fermentation It will be rapidly phagocytized upon entering the host It will no longer be motile It will not be able to appropriately transport ions across its plasma membrane
Question 4 1 / 1 point
Pyruvic acid must be converted into ___________ before entering the Krebs cycle Glycerol NAD+ Lactic acid Acetyl-CoA glyceraldehyde 3-phosphate
Question 5 1 / 1 point
In fermentation, the terminal electron acceptor is an organic compound carbon dioxide (CO 2 )
A Family is made up of Genera Species Groups Orders Classes
Question 9 0 / 1 point
Which scientist performed the first vaccination? Koch Fleming Pasteur Jenner Lister
Question 10 0 / 1 point
Which of the following reactions of the Krebs cycle results in the production of ATP? Succinyl~CoA ® Succinic acid Pyruvic acid ® Citric acid Citric acid ® Isocitric acid
Malic acid ® Oxaloacetic acid
Question 11 1 / 1 point
What is the correct order for the application of Koch's postulates? I. Inoculate suspect agent into test subject and observe that subject develops disease of interest. II. Isolate and culture suspect agent in the laboratory. III. Find suspect agent is every case of disease of interest but not in healthy hosts. IV. Recover and isolate suspect agent from test subject. III, I, IV, II I, II, III, IV III, II, I, IV IV, I, III, II
Question 12 1 / 1 point
Where are phospholipids most likely found in a prokaryotic cell? ribosomes the plasma membrane the plasma membrane and organelles organelles
Oxidative phosphorylation Glycolysis Substrate-level phosphorylation Fermentation Photophosphorylation
Question 16 1 / 1 point
A bacterium that only possesses the ability to ferment obtains energy by fermentation or aerobic respiration. by aerobic respiration only. only in the presence of oxygen. only in the absence of oxygen.
Question 17 1 / 1 point
The following figure shows how different bacterial species grow in a tube of solid medium ( pts): 1 2 3 4 5 Organism 2 is a Microaerophile Obligate aerobe Obligate anaerobe Facultative anaerobe
Question 18 1 / 1 point
Which of the following individuals pioneered the use of chemicals to reduce the incidence of infections during surgery by using carbolic acid? Ehrlich Snow Lister Nightingale Pasteur
Question 21 1 / 1 point
6. Which of the following describes the correct path of light in a compound light microscope, from the illumination source to the eye of the observer? Illuminator → condenser lenses → specimen → objective lenses → body tube → ocular lens → eye objective lenses → specimen → illuminator → condenser lenses → body tube → ocular lens → eye Illuminator → ocular lens → body tube → condenser lenses → specimen → objective lenses → eye condenser lenses → illuminator → specimen → objective lenses → body tube → ocular lens → eye
Question 22 1 / 1 point
Which of the following statements about fungi is FALSE? Fungi have a cell wall. Yeasts are unicellular. Molds are multicellular. Fungi are eukaryotes. Fungi are photosynthetic
Question 23 1 / 1 point
This staining technique is used to visualize red and white blood cells as well as some parasites.
Negative staining Giemsa staining Gram staining Acid-Fast staining Endospore staining
Question 24 1 / 1 point
Where is the majority of ATP generated in most eukaryotic cells? in the plasma membrane in the mitochondria in the cytosol on ribosomes in the cytoplasmic membrane
Question 25 1 / 1 point
What bacterial structure is usually observed by negative staining? Capsule Flagellum Endospore Pilus Cell wall
The flasks he used were sealed with corks. The flasks were incubated for very long periods of tim The necks of the flasks he used were bent into an S-shape The flasks were free of microbes until they were opene
Question 29 1 / 1 point
The acid-fast stain is used to observe members of what bacterial genus? Escherichia Mycobacterium Neisseria All of the above None of the above
Question 30 1 / 1 point
What type of microscope uses a pinhole aperture to produce 3-D reconstructive images? Transmission Confocal Fluorescence Light microscope
Question 31 1 / 1 point
The following figure shows how different bacterial species grow in a tube of solid medium ( pts): 1 2 3 4 5 Which of the microorganism is an obligate anaerobe? Organism 1 Organism 2 Organism 4 Organism 5 Organism 3
Question 32 1 / 1 point
If a light microscope has a 10x ocular lens and a 100x objective lens, how large would the image of a bacterium 1.0 μm in diameter appear? 1 μm 1 mm
50S ribosome 40S ribosome A cytoplasmic membrane DNA
Question 35 1 / 1 point
In prokaryotes, the electron transport chain is located… In the cytoplasmic membrane In the mitochondrion In the cell wall In the cytoplasm In the nucleoid
Question 36 1 / 1 point
This eukaryotic structure is responsible for the synthesis of phospholipids, fats, and steroids. Rough ER and Smooth ER Rough ER Smooth ER Nucleus
Ribosome
Question 37 1 / 1 point
Which of the following organisms lacks a nucleus? Bacteria None of the above Animal Protozoa Fungi
Question 38 1 / 1 point
Teichoic acids are typically found in Cell walls of Gram-negative bacteria Cell walls of Gram-positive bacteria Outer membranes of Gram-positive bacteria Outer membranes of Gram-negative bacteria
Question 39 1 / 1 point
What is the end product of glycolysis?
Question 42 1 / 1 point
Which of the following is true of anabolic reactions? Anabolic reactions break down complex organic compounds into simpler ones. Anabolic and catabolic reactions both build complex organic molecules from simpler ones; however, anabolic reactions use ATP, whereas catabolic reactions transfer energy to produce ATP. Anabolic reactions release energy, which is used to produce ATP. Anabolic reactions use ATP and small substrates as building blocks to synthesize larger molecules.
Question 43 1 / 1 point
Which of the following reactions of glycolysis is responsible for the production of ATP? Fructose 1,6-biphosphate ® Dihydroxyacetone-phosphate PEP ® Pyruvic acid Glyceraldehyde-3-phosphate ® 1,3-biphosphoglyceric acid Glucose ® Glucose-6-phosphate
Question 44 1 / 1 point
The Krebs cycle occurs in what cellular location? mitochondria in both prokaryotes and eukaryotes
cytosol in both prokaryotes and eukaryotes cytosol in prokaryotes and plasma membrane in eukaryotes cytosol in prokaryotes and mitochondria in eukaryotes
Question 45 0 / 1 point
During the light-independent stage of photosynthesis, this series of reactions plays a key role in the synthesis of glucose using ATP and NADPH generated by light-dependent reactions. Calvin-Benson cycle Entner-Doudorof pathway Glycolysis Krebs cycle Pentose phosphate pathway
Question 46 1 / 1 point
Which of the following elements is NOT correctly matched with its cellular function? sulfur – used for synthesis of thiamin and biotin phosphorus – used for production of carbohydrates. nitrogen – needed for amino acid synthesis magnesium and potassium – required as cofactors for enzymes
