Explore topic-wise MCQs in Microbiology.

This section includes 126 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.

101.

What is Mycology?
A. Study of viruses
B. Study of nucleic acid
C. Study of bacteria
D. Study of fungi
Answer» E.
Discussion
102.

Which of the following organelles contain DNA, divides and possesses some degree of autonomy?
A. Golgi apparatus
B. Ribosome
C. Chloroplast
D. Peroxisomes
Answer» D. Peroxisomes
Discussion
103.

Genetic and biochemical similarities between contemporary cyanobacteria and eukaryotic chloroplasts are accepted to mean that
A. eukaryotes evolved from bacteria
B. eukaryotes evolved from archaea
C. oxygenic photosynthesis first evolved in eukaryotes
D. cyanobacteria arose from chloroplasts which escaped from plant cells
Answer» C. oxygenic photosynthesis first evolved in eukaryotes
Discussion
104.

All of the following individuals contributed to cell theory except
A. Robert Hooke
B. Matthias Schleiden
C. Theodor Schwann
D. Rudolf Virchow
Answer» B. Matthias Schleiden
Discussion
105.

Which were the investigators lived at the same time?
A. Koch and Pasteur
B. Darwin and Woese
C. Van Leeuenhoek and Ricketts
D. Berg and Hooke
Answer» B. Darwin and Woese
Discussion
106.

The unifying feature of the archaea that distinguishes them from the bacteria is
A. habitats which are extreme environments with regard to acidity
B. absence of a nuclear membrane temperature
C. presence of a cell wall containing a characteristic outer membrane
D. cytoplasmic ribosomes that are 70S
Answer» C. presence of a cell wall containing a characteristic outer membrane
Discussion
107.

The phospholipids present in cytoplasm membrane of the archaeo-bacteria is
A. phosphoglycerides
B. polyisoprenoid
C. polyisoprenoid branched chain lipids
D. none of the above
Answer» D. none of the above
Discussion
108.

The oldest eukaryotic organisms are considered to be
A. diplomonads like Giardia
B. archaea
C. fungi
D. animals
Answer» C. fungi
Discussion
109.

The phospholipids present in cytoplasm membrane of eubacteria is mainly
A. phosphoglycerides
B. polyisoprenoid
C. phospholipoprotein
D. none of these
Answer» B. polyisoprenoid
Discussion
110.

The word cell was first used by
A. Robert Hooke
B. Theodor Schwann
C. Louis Pasteur
D. Ronald Ross
Answer» B. Theodor Schwann
Discussion
111.

Most microbial structures and enzymes are composed of
A. lipids
B. proteins
C. carbohydrates
D. lipids and carbohydrates
Answer» C. carbohydrates
Discussion
112.

Which of the following structures is the smallest?
A. Viriod
B. Hydrogen atom
C. Bacterium
D. Mitochondrion
Answer» C. Bacterium
Discussion
113.

Living organisms have many complex characteristics. Which one of the following is shared by non-living matter as well?
A. Homeostasis
B. Tissues
C. Reproduction
D. Molecules
Answer» E.
Discussion
114.

Which of the following is not found in the kingdom Monera?
A. Organelles
B. Organized cell structure
C. Ability to reproduce
D. Ability to use energy
Answer» B. Organized cell structure
Discussion
115.

Cell theory includes all of the following except
A. all organisms are composed of one or more cells
B. the cell is the most primitive form of life
C. the cell is the structural unit of life
D. cells arise by division of preexisting cells
Answer» C. the cell is the structural unit of life
Discussion
116.

All the following are considered eukaryotes except
A. archaea
B. fungi
C. protozoa
D. humans
Answer» B. fungi
Discussion
117.

Various bacterial species can be subdivided into
A. subspecies
B. biovarieties
C. serovarieties
D. all of these
Answer» E.
Discussion
118.

Who discovered the bacteria that cause cholera?
A. Pierre Berthelot
B. Robert Koch
C. Louis Pasteur
D. Rudolf Virchow
Answer» C. Louis Pasteur
Discussion
119.

The Archaea include all of the following except
A. methanogens
B. halophiles
C. thermoacidophiles
D. cyanobacteria
Answer» E.
Discussion
120.

Who was the inventor of the Petri dish?
A. R.J. Petri, an assistant of R. Koch
B. A famous French cook
C. Italian glass blower from Petri, Italy
D. None of the above
Answer» B. A famous French cook
Discussion
121.

Eukaryotic micro organisms include
A. protozoa
B. fungi
C. algae
D. all of these
Answer» E.
Discussion
122.

Which of the following is considered the most unifying concept in biology?
A. Taxonomy
B. Anatomy
C. Genetics
D. Evolution
Answer» E.
Discussion
123.

A characteristic of protein synthesis in both the archaea and eukarya is
A. transcription and translation are coupled
B. translation is inhibited by diphtheria toxin
C. proteins are synthesized from D-, rather than L-, isomers of amino acids
D. the initiator tRNA is charged with N-formyl-methionine
Answer» D. the initiator tRNA is charged with N-formyl-methionine
Discussion
124.

Which of the following is not true for prokaryotic organism?
A. Nucleus is not bounded by nuclear membrane
B. Chromosomes does not contain histones
C. 80S ribosomes are distributed in cytoplasm
D. Cell wall contains peptidoglycan as one of the major component
Answer» D. Cell wall contains peptidoglycan as one of the major component
Discussion
125.

Eukaryotic cell organelles first emerged
A. from a specialized lineage of cells within the kingdom Protista
B. when prokaryotes engulfed each other and became interdependent
C. when bacteria made their first attempts at reproduction
D. just before the origin of the animal and fungal kingdoms
Answer» C. when bacteria made their first attempts at reproduction
Discussion
126.

Which of the following sequences has helped in identifying eukaryotes, eubacteria and archeabacterial cell types?
A. Signature sequence
B. Signal sequence
C. Shine-Dalgarno sequence
D. Amino acid sequence
Answer» B. Signal sequence
Discussion