Podcast
Questions and Answers
What theory states that living creatures could arise without parents?
What theory states that living creatures could arise without parents?
- Biological Molecules Theory
- Spontaneous Generation Theory (correct)
- Germ Theory
- Abiogenesis Theory
Which of the following is NOT one of Koch’s Postulates used to describe the role of microbes in diseases?
Which of the following is NOT one of Koch’s Postulates used to describe the role of microbes in diseases?
- The suspected organism should be present in ALL cases of the disease and ABSENT from healthy animals (correct)
- Cells from a pure culture of the suspected organism should CAUSE DISEASE in a healthy animal
- The suspected organism should be grown in PURE CULTURE
- The suspected organism should be REISOLATED (the same organism as before)
What is the main function of 16S rRNA in bacterial evolution?
What is the main function of 16S rRNA in bacterial evolution?
- To determine genetic relatedness and serve as a molecular clock (correct)
- To initiate spontaneous generation of new bacteria
- To cause disease in healthy animals
- To preserve food and destroy crops
How did the theory of spontaneous generation get disproved?
How did the theory of spontaneous generation get disproved?
Which type of molecules arise abiotically from simply reduced chemicals sparked by lighting?
Which type of molecules arise abiotically from simply reduced chemicals sparked by lighting?
What is the most widely used molecular clock for bacterial evolution?
What is the most widely used molecular clock for bacterial evolution?
What is the main impact of microorganisms on food availability?
What is the main impact of microorganisms on food availability?
Which theory describes the idea that a specific type of microorganism causes a specific disease?
Which theory describes the idea that a specific type of microorganism causes a specific disease?
Which type of molecules contain temporal information used as a molecular clock?
Which type of molecules contain temporal information used as a molecular clock?
What is the main reason behind the constant substitution rate in molecular clocks?
What is the main reason behind the constant substitution rate in molecular clocks?
Which type of mutation does not change the amino acid sequence?
Which type of mutation does not change the amino acid sequence?
What is the enzyme that promotes transposition in the simplest transposons?
What is the enzyme that promotes transposition in the simplest transposons?
What is the function of the Ames test?
What is the function of the Ames test?
Which repair mechanism corrects mismatches missed by proofreading?
Which repair mechanism corrects mismatches missed by proofreading?
What happens when extensive DNA damage induces SOS response?
What happens when extensive DNA damage induces SOS response?
What type of repair recognizes and repairs bases that mostly do not distort DNA structure?
What type of repair recognizes and repairs bases that mostly do not distort DNA structure?
What is a characteristic of transversion mutations?
What is a characteristic of transversion mutations?
What is the term used for the addition of one or more bases in DNA?
What is the term used for the addition of one or more bases in DNA?
What is a characteristic of silent mutations?
What is a characteristic of silent mutations?
What is a characteristic of point mutations?
What is a characteristic of point mutations?
What distinguishes prokaryotic cells from eukaryotic cells in terms of DNA location?
What distinguishes prokaryotic cells from eukaryotic cells in terms of DNA location?
Which bacterial cell shape is characterized by a helical structure?
Which bacterial cell shape is characterized by a helical structure?
What is the main difference between the envelopes of Gram-positive and Gram-negative bacteria?
What is the main difference between the envelopes of Gram-positive and Gram-negative bacteria?
What step of the Gram stain procedure removes the stain from Gram-negative but not from Gram-positive cells?
What step of the Gram stain procedure removes the stain from Gram-negative but not from Gram-positive cells?
How can chemical gradients across membranes be used to drive cellular processes?
How can chemical gradients across membranes be used to drive cellular processes?
What is the primary characteristic of active transport?
What is the primary characteristic of active transport?
Which transport system combines active energy use with facilitated diffusion?
Which transport system combines active energy use with facilitated diffusion?
What distinguishes Sec-dependent secretion systems in bacteria?
What distinguishes Sec-dependent secretion systems in bacteria?
What type of transport system escorts specific substrate to transporter?
What type of transport system escorts specific substrate to transporter?
What happens to the signal peptide during the secretion via Sec-dependent secreted proteins?
What happens to the signal peptide during the secretion via Sec-dependent secreted proteins?
What is the main advantage of using ribosomal DNA for evolutionary studies?
What is the main advantage of using ribosomal DNA for evolutionary studies?
According to the endosymbiont theory, how did mitochondria and chloroplasts originate?
According to the endosymbiont theory, how did mitochondria and chloroplasts originate?
What is the role of the restriction/modification system in bacterial cells?
What is the role of the restriction/modification system in bacterial cells?
Which enzyme is responsible for removing RNA primers and filling the gaps in the lagging DNA strand during bacterial chromosomal replication?
Which enzyme is responsible for removing RNA primers and filling the gaps in the lagging DNA strand during bacterial chromosomal replication?
What is the function of sigma factors in transcription?
What is the function of sigma factors in transcription?
What is the general role of repressors in gene expression regulation?
What is the general role of repressors in gene expression regulation?
What are open reading frames (ORFs) in the context of molecular genetics?
What are open reading frames (ORFs) in the context of molecular genetics?
In Rho-independent transcriptional termination, what causes the RNA polymerase to pause and terminate transcription?
In Rho-independent transcriptional termination, what causes the RNA polymerase to pause and terminate transcription?
How does prokaryotic translation differ from eukaryotic translation?
How does prokaryotic translation differ from eukaryotic translation?
What is the significance of the Shine-Dalgarno sequence in translation?
What is the significance of the Shine-Dalgarno sequence in translation?
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