Microbial Genetics and Genome Structure in
Microbiology Test with complete solutions latest
2026/27 UPDATE
What is genetics?
The study of inheritance and inheritable traits as expressed in an organism's genetic material.
Define genome.
The entire genetic complement of an organism, including its genes and nucleotide sequences.
What is phenotype?
The expression of the genes, which is the collection of proteins.
What are the two types of proteins related to phenotype?
Enzymatic (catalysts) and structural (structures).
What is the central dogma of biology?
The flow of information from DNA to RNA to proteins.
What does the genetic code determine?
How a nucleotide sequence is converted to an amino acid sequence of a protein.
What is the significance of DNA's complementarity?
It allows precise copying of the molecule by using one strand as a template for the other.
What is vertical gene transfer?
The flow of genetic information from one generation to the next.
, Define horizontal gene transfer.
The transfer of genes not using traditional reproduction.
What characterizes prokaryotic chromosomes?
They are the main portion of DNA, haploid, and typically circular molecules of DNA found in
the nucleoid.
What are plasmids?
Small molecules of DNA that replicate independently and can confer survival advantages.
What types of plasmids exist?
Fertility factors, resistance factors, bacteriocin factors, and virulence plasmids.
How do eukaryotic genomes differ from prokaryotic genomes?
Eukaryotic genomes typically have more than one linear chromosome per cell and are
sequestered within a nucleus.
What is the role of histones in eukaryotic cells?
They are used for packing DNA within the nucleus.
What is the structure of DNA?
A double helix with a backbone of deoxyribose-phosphate and strands held together by hydrogen
bonds.
What is semiconservative replication?
A process where new DNA is composed of one original and one daughter strand.
Microbiology Test with complete solutions latest
2026/27 UPDATE
What is genetics?
The study of inheritance and inheritable traits as expressed in an organism's genetic material.
Define genome.
The entire genetic complement of an organism, including its genes and nucleotide sequences.
What is phenotype?
The expression of the genes, which is the collection of proteins.
What are the two types of proteins related to phenotype?
Enzymatic (catalysts) and structural (structures).
What is the central dogma of biology?
The flow of information from DNA to RNA to proteins.
What does the genetic code determine?
How a nucleotide sequence is converted to an amino acid sequence of a protein.
What is the significance of DNA's complementarity?
It allows precise copying of the molecule by using one strand as a template for the other.
What is vertical gene transfer?
The flow of genetic information from one generation to the next.
, Define horizontal gene transfer.
The transfer of genes not using traditional reproduction.
What characterizes prokaryotic chromosomes?
They are the main portion of DNA, haploid, and typically circular molecules of DNA found in
the nucleoid.
What are plasmids?
Small molecules of DNA that replicate independently and can confer survival advantages.
What types of plasmids exist?
Fertility factors, resistance factors, bacteriocin factors, and virulence plasmids.
How do eukaryotic genomes differ from prokaryotic genomes?
Eukaryotic genomes typically have more than one linear chromosome per cell and are
sequestered within a nucleus.
What is the role of histones in eukaryotic cells?
They are used for packing DNA within the nucleus.
What is the structure of DNA?
A double helix with a backbone of deoxyribose-phosphate and strands held together by hydrogen
bonds.
What is semiconservative replication?
A process where new DNA is composed of one original and one daughter strand.
