BACE TEST PAPER 2025/2026 QUESTIONS WITH ANSWERS
TAGGED A+
✔✔To dilute a bacterial culture, 10 uL of culture is mixed with fresh culture medium to a
final volume of 0.5 mL. The culture was diluted by a factor of: - ✔✔50
✔✔bleach - ✔✔Basic
✔✔lemon juice - ✔✔Acidic
✔✔Baking soda - ✔✔Basic
✔✔Oven cleaner - ✔✔Basic
✔✔vinegar - ✔✔Acidic
✔✔NaCl bond type - ✔✔ionic bond
✔✔H20 bond type - ✔✔Polar covalent
✔✔CH4 bond type - ✔✔Nonpolar covalent
✔✔What is used to calculate the amount of compound required to make a solution -
✔✔Molecular weight
✔✔carbohydrates function - ✔✔Cellulose. Energy storage, receptors, structure of cell
wall
✔✔Lipids function - ✔✔Cholesterol. Membrane structure, energy storage
✔✔Nucleic acids function - ✔✔RNA. information storage and transfer
✔✔Proteins function - ✔✔Enzymes. structure, receptors, transport
✔✔is the solvent the dissolved matter in a solution - ✔✔False
✔✔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: - ✔✔Anaerobic respiration
✔✔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?
Group of answer choices - ✔✔The enzyme activity would decrease, yielding the same
level of glucose over a longer time period
✔✔How does DNA differ from one species to another? - ✔✔The number of genes and
non-coding regions
✔✔Eukaryotic cells - ✔✔Linear, long pieces of DNA with many thousands of genes,
contained within a nucleus
✔✔Prokaryotic DNA - ✔✔Circular, long DNA containing several thousand genes
✔✔Plasmid DNA - ✔✔Cytoplasmic, circular DNA containing only a few genes
✔✔The three-dimensional structure of a protein is largely determined by the amino acid
sequence. True or False - ✔✔True
✔✔A single base pair change in a gene's DNA sequence can affect the shape and
function of the protein it encodes. - ✔✔True
✔✔correct order of assembly in the cell: - ✔✔Amino acid, polypeptide, protein
✔✔What is a disadvantage to using prokaryotes in the production of
biopharmaceuticals?
Group of answer choices - ✔✔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? - ✔✔Plasma
membrane
✔✔Why is E. coli usually incubated at 37°C? - ✔✔The maximum growth rate for E. coli
occurs at 37 degrees celcius
✔✔Which of the following serves as the decolorizer in a Gram stain? - ✔✔Alcohol
✔✔what is an accurate description of Gram positive bacteria after Gram staining? -
✔✔Purple, because gram positive bacteria have a thick layer of peptidoglycan in the
cell membrane.
✔✔When exposed to a foreign antigen, the normal human immune system response is
to produce which of the following? - ✔✔Antibodies
TAGGED A+
✔✔To dilute a bacterial culture, 10 uL of culture is mixed with fresh culture medium to a
final volume of 0.5 mL. The culture was diluted by a factor of: - ✔✔50
✔✔bleach - ✔✔Basic
✔✔lemon juice - ✔✔Acidic
✔✔Baking soda - ✔✔Basic
✔✔Oven cleaner - ✔✔Basic
✔✔vinegar - ✔✔Acidic
✔✔NaCl bond type - ✔✔ionic bond
✔✔H20 bond type - ✔✔Polar covalent
✔✔CH4 bond type - ✔✔Nonpolar covalent
✔✔What is used to calculate the amount of compound required to make a solution -
✔✔Molecular weight
✔✔carbohydrates function - ✔✔Cellulose. Energy storage, receptors, structure of cell
wall
✔✔Lipids function - ✔✔Cholesterol. Membrane structure, energy storage
✔✔Nucleic acids function - ✔✔RNA. information storage and transfer
✔✔Proteins function - ✔✔Enzymes. structure, receptors, transport
✔✔is the solvent the dissolved matter in a solution - ✔✔False
✔✔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: - ✔✔Anaerobic respiration
✔✔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?
Group of answer choices - ✔✔The enzyme activity would decrease, yielding the same
level of glucose over a longer time period
✔✔How does DNA differ from one species to another? - ✔✔The number of genes and
non-coding regions
✔✔Eukaryotic cells - ✔✔Linear, long pieces of DNA with many thousands of genes,
contained within a nucleus
✔✔Prokaryotic DNA - ✔✔Circular, long DNA containing several thousand genes
✔✔Plasmid DNA - ✔✔Cytoplasmic, circular DNA containing only a few genes
✔✔The three-dimensional structure of a protein is largely determined by the amino acid
sequence. True or False - ✔✔True
✔✔A single base pair change in a gene's DNA sequence can affect the shape and
function of the protein it encodes. - ✔✔True
✔✔correct order of assembly in the cell: - ✔✔Amino acid, polypeptide, protein
✔✔What is a disadvantage to using prokaryotes in the production of
biopharmaceuticals?
Group of answer choices - ✔✔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? - ✔✔Plasma
membrane
✔✔Why is E. coli usually incubated at 37°C? - ✔✔The maximum growth rate for E. coli
occurs at 37 degrees celcius
✔✔Which of the following serves as the decolorizer in a Gram stain? - ✔✔Alcohol
✔✔what is an accurate description of Gram positive bacteria after Gram staining? -
✔✔Purple, because gram positive bacteria have a thick layer of peptidoglycan in the
cell membrane.
✔✔When exposed to a foreign antigen, the normal human immune system response is
to produce which of the following? - ✔✔Antibodies
