Module 5
A combination of three bases is needed to code for one amino acid. The three bases are known as
a codon
Gene modification in food crops is an example of
modern biotechnology
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
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
Hybrid vigour arises through
crossbreeding
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 systems are involved in the maintenance of homeostasis
nervous and endocrine systems
During polypeptide synthesis, the molecule that reads codons and brings the correct amino acid into place is:
tRNA
Modern applications of genetics have been stimulated by the work of many scientists. Which scientist was instrumental in the development of biotechnology?
Louis Pasteur
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
An example of non-nuclear DNA in eukaryotes is:
mitochondrial DNA
EcoRI is an example of a
Restriction enzyme
You examine a plant with a hand lens and notice the leaves contain mosaic patterns of a lighter colour than the leaf itself. Mosaic discolouration of leaves is most commonly associated with infection by:
viruses
The human body requires minerals to function properly. The condition caused by a deficiency in iron is
Anaemia
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:
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