STRAIGHTERLINE MICROBIOLOGY
EXAMINATION TEST 2026 FULL QUESTIONS
AND VERIFIED ANSWERS GRADED A+
⩥ Which technique did Carl Woese and George Fox use to analyze the
evolutionary relationships among organisms?
Select one:
a.X-ray crystallography
b.Microscopy
c.Genetic sequencing
d.Electrophoresis. Answer: c.Genetic sequencing
⩥ Which of the following statements about Robert Koch's achievements
in microbiology is correct?
Select one:
a.Robert Koch was the first to demonstrate the connection between a
single, isolated microbe and a known human disease.
b.Robert Koch demonstrated that fermentation is caused by chemical
reactions, not microorganisms.
c.Robert Koch invented the process of pasteurization to kill harmful
microorganisms in food and drink items.
,d.Robert Koch discovered the structure of DNA.. Answer: a.
Robert Koch was the first to demonstrate the connection between a
single, isolated microbe and a known human disease.
⩥ What distinguishes the five-kingdom classification system proposed
by Robert Whittaker?
Select one:
a.It included fungi as a separate kingdom.
b.It was based solely on observable characteristics.
c.It classified all organisms into either plants or animals.
d.It introduced the concept of domains above the kingdom level..
Answer: a.It included fungi as a separate kingdom.
⩥ Imagine you're a biologist conducting field research in a remote
jungle, where you stumble upon a new species of frog. After identifying
and naming the frog species, you need to refer to it multiple times in
your research notes. How would you typically abbreviate the organism's
genus and species names after their initial mention as per the rules of
binomial nomenclature?
Select one:
a.Both the genus and species names are abbreviated using their first
three letters.
,b.The genus name is abbreviated using its first initial followed by a
period, followed by the full species name.
c.Neither the genus nor the species names are abbreviated in subsequent
mentions.
d.Only the species name is abbreviated, using its first letter followed by
a period and the full genus name.. Answer: b.The genus name is
abbreviated using its first initial followed by a period, followed by the
full species name.
⩥ What is the most common sterol found in animal tissues?
Select one:
a.Cholesterol
b.Ergosterol
c.Beta-carotene
d.Hopanoids. Answer: a.Cholesterol
⩥ What is the term used for the unique structure formed by leguminous
plants in symbiosis with rhizobia?
Select one:
a.Lichen
b.Tuber
c.Mycorrhizae
, d.Nodule. Answer: d.Nodule
⩥ Which disaccharide is composed of glucose and fructose units?
Select one:
a.Maltose
b.Sucrose
c.Galactose
d.Lactose. Answer: b.Sucrose
⩥ What is the primary structure of a protein composed of?
Select one:
a.Disulfide bonds between amino acids
b.Hydrogen bonds between amino acids
c.Amino acid residues forming a peptide chain
d.Polar interactions between amino acid side chains. Answer: c.Amino
acid residues forming a peptide chain
⩥ Match the following saccharides with their descriptions or properties:
SaccharideDescriptionA. Glucose1. Primary energy storage molecule in
animals and bacteria.B. Sucrose2. Most abundant monosaccharide in
EXAMINATION TEST 2026 FULL QUESTIONS
AND VERIFIED ANSWERS GRADED A+
⩥ Which technique did Carl Woese and George Fox use to analyze the
evolutionary relationships among organisms?
Select one:
a.X-ray crystallography
b.Microscopy
c.Genetic sequencing
d.Electrophoresis. Answer: c.Genetic sequencing
⩥ Which of the following statements about Robert Koch's achievements
in microbiology is correct?
Select one:
a.Robert Koch was the first to demonstrate the connection between a
single, isolated microbe and a known human disease.
b.Robert Koch demonstrated that fermentation is caused by chemical
reactions, not microorganisms.
c.Robert Koch invented the process of pasteurization to kill harmful
microorganisms in food and drink items.
,d.Robert Koch discovered the structure of DNA.. Answer: a.
Robert Koch was the first to demonstrate the connection between a
single, isolated microbe and a known human disease.
⩥ What distinguishes the five-kingdom classification system proposed
by Robert Whittaker?
Select one:
a.It included fungi as a separate kingdom.
b.It was based solely on observable characteristics.
c.It classified all organisms into either plants or animals.
d.It introduced the concept of domains above the kingdom level..
Answer: a.It included fungi as a separate kingdom.
⩥ Imagine you're a biologist conducting field research in a remote
jungle, where you stumble upon a new species of frog. After identifying
and naming the frog species, you need to refer to it multiple times in
your research notes. How would you typically abbreviate the organism's
genus and species names after their initial mention as per the rules of
binomial nomenclature?
Select one:
a.Both the genus and species names are abbreviated using their first
three letters.
,b.The genus name is abbreviated using its first initial followed by a
period, followed by the full species name.
c.Neither the genus nor the species names are abbreviated in subsequent
mentions.
d.Only the species name is abbreviated, using its first letter followed by
a period and the full genus name.. Answer: b.The genus name is
abbreviated using its first initial followed by a period, followed by the
full species name.
⩥ What is the most common sterol found in animal tissues?
Select one:
a.Cholesterol
b.Ergosterol
c.Beta-carotene
d.Hopanoids. Answer: a.Cholesterol
⩥ What is the term used for the unique structure formed by leguminous
plants in symbiosis with rhizobia?
Select one:
a.Lichen
b.Tuber
c.Mycorrhizae
, d.Nodule. Answer: d.Nodule
⩥ Which disaccharide is composed of glucose and fructose units?
Select one:
a.Maltose
b.Sucrose
c.Galactose
d.Lactose. Answer: b.Sucrose
⩥ What is the primary structure of a protein composed of?
Select one:
a.Disulfide bonds between amino acids
b.Hydrogen bonds between amino acids
c.Amino acid residues forming a peptide chain
d.Polar interactions between amino acid side chains. Answer: c.Amino
acid residues forming a peptide chain
⩥ Match the following saccharides with their descriptions or properties:
SaccharideDescriptionA. Glucose1. Primary energy storage molecule in
animals and bacteria.B. Sucrose2. Most abundant monosaccharide in
