BACE FINAL EXAM 2024
what represents the correct order of assembly in the cell - ANSWER
Amino acid, polypeptide, protein
t/f: A single base pair change in a gene's DNA sequence can affect
the shape and function of the protein it encodes. - ANSWER true
t/f:The three-dimensional structure of a protein is largely determined
by the amino acid sequence. - ANSWER true
A structural gene's code is 5' TAC ATG CCC TTA ATC 3', what will the
mRNA transcript be? - ANSWER 3' AUG UAC GGG AAU UAG 5'
Circular, long DNA containing several thousand genes - ANSWER
Prokaryotic DNA
Cytoplasmic, circular DNA containing only a few genes - ANSWER
plasmid DNA
Linear, long pieces of DNA with many thousands of genes, contained
within a nucleus - ANSWER Eukaryotic DNA
How does DNA differ from one species to another? - ANSWER The
number of genes and non-coding regions
The enzyme maltase catalyzes the break down of maltose into
glucose. A technician added maltase to a solution of maltose to be
incubated at 37°C. Samples were taken from the reaction tube every
five minutes over the course of one hour, to measure the glucose
concentration. After an hour, the technician noticed the water bath
failed to reach 37°C (it only warmed to 25°C).
Which of the following is the most likely outcome of the reaction? -
ANSWER The enzyme activity would decrease, yielding the same
level of glucose over a longer time period.
Carbon dioxide as a by-product benefits the brewing and baking
, industry in a process called fermentation. When microorganisms
(usually yeast) undergo fermentation, they obtain their energy by: -
ANSWER Anaerobic respiration
t/f:A solvent is the dissolved matter in a solution. - ANSWER false
Carbohydrates - ANSWER Example: cellulose. Functions: energy
storage, receptors, structure of plant cell wall.
Lipids - ANSWER Example: cholesterol. Functions: membrane
structure, energy storage.
Nucleic acids - ANSWER example: RNA. Functions: information
storage and transfers
Proteins - ANSWER example: enzyme. Function: structure,
receptors and transport
Which of the following should be used to calculate the amount of
compound required to make a solution? - ANSWER Molecular
weight
bond type?: NaCl - ANSWER Ionic
bond type?: H2O - ANSWER polar covalent
bond type?:CH4 - ANSWER nonpolar covalent
What is a disadvantage to using prokaryotes in the production of
biopharmaceuticals? - ANSWER Prokaryotes are unable to properly
fold and assemble more complicated eukaryotic proteins.
Which structure regulates the flow of molecules into and out of the
cell? - ANSWER Plasma membrane
Why is E. coli usually incubated at 37°C? - ANSWER max growth
rate
Which of the following serves as the decolorizer in a Gram stain? -
ANSWER alcohol
Which of the following is an accurate description of Gram positive
what represents the correct order of assembly in the cell - ANSWER
Amino acid, polypeptide, protein
t/f: A single base pair change in a gene's DNA sequence can affect
the shape and function of the protein it encodes. - ANSWER true
t/f:The three-dimensional structure of a protein is largely determined
by the amino acid sequence. - ANSWER true
A structural gene's code is 5' TAC ATG CCC TTA ATC 3', what will the
mRNA transcript be? - ANSWER 3' AUG UAC GGG AAU UAG 5'
Circular, long DNA containing several thousand genes - ANSWER
Prokaryotic DNA
Cytoplasmic, circular DNA containing only a few genes - ANSWER
plasmid DNA
Linear, long pieces of DNA with many thousands of genes, contained
within a nucleus - ANSWER Eukaryotic DNA
How does DNA differ from one species to another? - ANSWER The
number of genes and non-coding regions
The enzyme maltase catalyzes the break down of maltose into
glucose. A technician added maltase to a solution of maltose to be
incubated at 37°C. Samples were taken from the reaction tube every
five minutes over the course of one hour, to measure the glucose
concentration. After an hour, the technician noticed the water bath
failed to reach 37°C (it only warmed to 25°C).
Which of the following is the most likely outcome of the reaction? -
ANSWER The enzyme activity would decrease, yielding the same
level of glucose over a longer time period.
Carbon dioxide as a by-product benefits the brewing and baking
, industry in a process called fermentation. When microorganisms
(usually yeast) undergo fermentation, they obtain their energy by: -
ANSWER Anaerobic respiration
t/f:A solvent is the dissolved matter in a solution. - ANSWER false
Carbohydrates - ANSWER Example: cellulose. Functions: energy
storage, receptors, structure of plant cell wall.
Lipids - ANSWER Example: cholesterol. Functions: membrane
structure, energy storage.
Nucleic acids - ANSWER example: RNA. Functions: information
storage and transfers
Proteins - ANSWER example: enzyme. Function: structure,
receptors and transport
Which of the following should be used to calculate the amount of
compound required to make a solution? - ANSWER Molecular
weight
bond type?: NaCl - ANSWER Ionic
bond type?: H2O - ANSWER polar covalent
bond type?:CH4 - ANSWER nonpolar covalent
What is a disadvantage to using prokaryotes in the production of
biopharmaceuticals? - ANSWER Prokaryotes are unable to properly
fold and assemble more complicated eukaryotic proteins.
Which structure regulates the flow of molecules into and out of the
cell? - ANSWER Plasma membrane
Why is E. coli usually incubated at 37°C? - ANSWER max growth
rate
Which of the following serves as the decolorizer in a Gram stain? -
ANSWER alcohol
Which of the following is an accurate description of Gram positive
