Biotech - Bacteria

Multiple Choice

Which of the following is NOT a characteristic of prokaryotic cells?

• They have no organelles

• Most possess peptidoglycan in their cell wall

• Protein synthesis occurs in the cytosol

• They have a nucleus

Multiple Choice

Which of the following statements best describes bacteria?

• They are the most abundant and diversified group of micro-organisms on Earth, adapted for different living conditions.

• They are only found in extreme environments.

• They are all harmful to humans.

• They can only survive in the absence of oxygen.

Multiple Choice

Circular DNA of Bacteria

• chromatin

• capsule

• plasmid

• pili

Multiple Choice

Hair-like structure used for adhesion and bacterial conjugation

• flagella

• capsule

• pili

• plasmid

Multiple Choice

Which bacterial structure is responsible for adherence to surfaces and forming colonies?

• Capsule

• Cell wall

• Plasma membrane

• Flagella

Multiple Choice

Bacterial structure responsible for motility

• capsule

• plasmid

• pili

• flagella

Fill in the Blanks

Fill in the blank: Endospores are produced by bacteria to ensure survival during periods of environmental

.

Multiple Choice

Surrounded by lateral flagella

• lophotrichous

• amphitrichous

• monotrichous

• peritrichous

Multiple Choice

A cluster of flagella on one polar end

• lophotrichous

• amphitrichous

• monotrichous

• peritrichous

Multiple Choice

Single or cluster on both polar end

• lophotrichous

• amphitrichous

• monotrichous

• peritrichous

Multiple Choice

Which of the following is a key difference between archaebacteria and eubacteria?

• Archaebacteria have cell walls containing peptidoglycan, while eubacteria do not.

• Eubacteria are always found in extreme environments, while archaebacteria are not.

• Archaebacteria are less sensitive to antibiotics, while eubacteria may show sensitivity or resistance.

• Eubacteria are always aerobic, while archaebacteria may be aerobic or anaerobic.

Multiple Choice

Ensure survival of a bacterium through periods of environmental stress

• endospores

• protoplast

• vibrio

• coccus

Multiple Choice

Comma shaped bacteria

• coccus

• bacillus

• vibrio

• endospores

Multiple Choice

Rod shaped bacteria

• coccus

• vibrio

• spirochete

• bacillus

Multiple Choice

Which of the following are considered basic shapes of bacterial cells?

• Cocci, Bacilli, Spirilla

• Cocci, Bacilli, Amoeba

• Cocci, Bacilli, Paramecium

• Cocci, Bacilli, Sarcina

Multiple Choice

Which of the following is NOT a way bacteria can be arranged?

• Singly

• Pairs

• Clusters

• Filaments

Multiple Choice

Who introduced the Gram staining technique and in what year?

• Louis Pasteur in 1875

• Hans Christian Gram in 1882

• Robert Koch in 1890

• Alexander Fleming in 1928

Fill in the Blanks

Gram-positive bacteria have a thick layer of

in their cell wall.

Multiple Choice

Gram-negative bacteria have thick layer of ____

• peptidoglycan

• lipids

• proteins

• lipopolysaccharide

Multiple Choice

Which process allows bacteria to reproduce rapidly, resulting in two genetically identical daughter cells?

• Binary fission

• Conjugation

• Transformation

• Transduction

Multiple Select

Which of the following is not a method of acquiring new DNA for bacteria?

• Conjugation

• Transformation

• Transduction

• Binary fission

Multiple Choice

The image shows two bacteria connected by a structure. This structure is most likely involved in which process?

• Conjugation

• Binary fission

• Transformation

• Transduction

Multiple Choice

Bacteria can adapt to different living conditions. Which of the following is NOT a type of adaptation mentioned in the lesson?

• Thermophilic chemosynthetic autotrophs

• Photosynthetic autotrophs

• Parasitic fungi

• Differently shaped micro-organisms

Multiple Choice

Bacteria that obtain food from tissues of living organisms

• photosynthetic

• parasitic

• saprophytic

• chemosynthetic

Multiple Choice

Bacteria that obtain food from oxidation of certain inorganic chemicals

• photosynthetic

• parasitic

• saprophytic

• chemosynthetic

Multiple Choice

Bacteria that obtain food from dead organic decaying substances

• photosynthetic

• parasitic

• saprophytic

• chemosynthetic