TTU MBIO 3401 Exam 1 (Zhang)
Questions & Answers (Grade A+)
In theory, a peptide made of four amino acids can have _______
possible combinations? -
correct answer ✅160,000
Consider a mutation in which the change is from UAC to UAU. Both
codons specify the amino acid tyrosine. Which type of point
mutation is this? -
correct answer ✅Silent Mutation
In aerobic respiration, the final electron acceptor is -
correct answer ✅Oxygen
You are given an electron micrograph of a bacterial cell. In the
micrograph, you can clearly see 3-three thin layers of different
densities surrounding the cell. Based on the micrograph, you can
infer that this cell _____ and would appear ____ after the
application of the gram stain procedure. -
correct answer ✅gram-negative / pink
Phosphorylation of ____ regulates which direction a flagellum
rotates, thus controlling whether an organism runs or tumbles. -
correct answer ✅CheY
, TTU MBIO 3401 Exam 1 (Zhang)
Questions & Answers (Grade A+)
Why are viruses excluded from the ribosomal RNA-based tree of
life? -
correct answer ✅They lack ribosomal RNA (rRNA)
Which of the following would be used by a chemoorganotroph for
energy? -
correct answer ✅glucose
Consider conjugation in Escherichia coli. In which of the following
matings would chromosomal genes be transferred most frequently?
-
correct answer ✅Hfr x F-
In the process of transcription, promoters are specific sequences of
___ that are recognized by ___. -
correct answer ✅DNA / sigma factors
An average-sized bacterium is 0.2-0.5 ___ in diameter and 2-5 ___
in length -
correct answer ✅ɥm, ɥm
Questions & Answers (Grade A+)
In theory, a peptide made of four amino acids can have _______
possible combinations? -
correct answer ✅160,000
Consider a mutation in which the change is from UAC to UAU. Both
codons specify the amino acid tyrosine. Which type of point
mutation is this? -
correct answer ✅Silent Mutation
In aerobic respiration, the final electron acceptor is -
correct answer ✅Oxygen
You are given an electron micrograph of a bacterial cell. In the
micrograph, you can clearly see 3-three thin layers of different
densities surrounding the cell. Based on the micrograph, you can
infer that this cell _____ and would appear ____ after the
application of the gram stain procedure. -
correct answer ✅gram-negative / pink
Phosphorylation of ____ regulates which direction a flagellum
rotates, thus controlling whether an organism runs or tumbles. -
correct answer ✅CheY
, TTU MBIO 3401 Exam 1 (Zhang)
Questions & Answers (Grade A+)
Why are viruses excluded from the ribosomal RNA-based tree of
life? -
correct answer ✅They lack ribosomal RNA (rRNA)
Which of the following would be used by a chemoorganotroph for
energy? -
correct answer ✅glucose
Consider conjugation in Escherichia coli. In which of the following
matings would chromosomal genes be transferred most frequently?
-
correct answer ✅Hfr x F-
In the process of transcription, promoters are specific sequences of
___ that are recognized by ___. -
correct answer ✅DNA / sigma factors
An average-sized bacterium is 0.2-0.5 ___ in diameter and 2-5 ___
in length -
correct answer ✅ɥm, ɥm
