Module 5
A combination of three bases is needed to code for one amino acid. The three bases are known as
a codon
This type of mutation involves a change in a single nucleotide base in DNA.
point mutation
Macroparasites are visible to the naked eye. They include two major groups which can be classified as:
endoparasites and ectoparasites
The maintenance of a relatively constant internal state
Homeostasis
This safety document identifies potential hazards, their impacts, and how to prevent them during an experiment.
risk assessment
If a strand of DNA with the sequence of bases TTAGCG gives rise to a strand of mRNA, what would the order of bases be in this complementary mRNA molecule?
AAUCGC
This process, used in agriculture, involves deliberately choosing organisms with desirable traits to reproduce.
artificial selection
You discover an organism that consists solely of abnormal proteins and without genetic material. This is most likely to be a:
prion
In mammals, which 2 systems are involved in the maintenance of homeostasis
nervous and endocrine systems
The degree to which a measuring device or technique gives close measurements to the true value is called this.
accuracy
During polypeptide synthesis, the molecule that reads codons and brings the correct amino acid into place is:
tRNA
This technique allows scientists to produce multiple identical copies of a DNA sequence in a short amount of time.
PCR (polymerase chain reaction)
You are setting up a scientific investigation to test the hypothesis that a certain type of bacteria needs to be grown on blood agar rather than the standard agar.
In this hypothesis, the type of agar is the:
independent variable
The presence of an incorrect number of chromosomes can lead to certain syndromes. The term used to describe the presence of an extra chromosome along with the normal chromosome pair is:
Trisomy
This type of variable is the one that is measured and observed in an experiment
the dependent variable
An example of non-nuclear DNA in eukaryotes is:
mitochondrial DNA
EcoRI is an example of a
Restriction enzyme
These proteins are produced by B lymphocytes and bind to specific antigens to neutralise or destroy pathogens.
antibodies
This eye condition, also called short-sightedness, occurs when light focuses in front of the retina, making distant objects appear blurry.
myopia
When presenting data, this type of graph is most appropriate for showing the relationship between two quantitative continuous variables.
a line graph
What is the correct order of molecules, listed from smallest to largest?
Amino acid , .........., ................, Protein
Amino acid, peptide chain, polypeptide, protein
In the laboratory, DNA sequences can be cut and combined in a different way. Joining two strands of DNA together is done using which enzyme:
DNA ligase
Pasteur’s famous swan-necked flask experiment disproved the long-held belief in
spontaneous generation
The number of new cases of a disease in a particular time period is known as the:
Incidence
This term describes the extent to which the results of an investigation measure what they are supposed to measure, by controlling all other variable.
validity