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Microbiology Exam 1 Answers, Exams of Microbiology

This document contains all answers to Exam 1. ALL HIGHLIGHTED ANSWERS ARE THE CORRECT ANSWERS. QUESTIONS MAY BE OUT OF ORDER DUE TO THE PROFESSOR SHUFFLING THEM ON YOUR END.

Typology: Exams

2022/2023

Available from 08/10/2023

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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?
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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.

  • by glycolysis only.

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