In the diagram of a ribosome, which letter indicates the P site?
[Source: iStock.com/ttsz]
Which cell component synthesizes actin and myosin?
Which DNA has identical base pair sequences?
I. DNA that segregates during mitosis
II. DNA that segregates during meiosis I
III. DNA that segregates during meiosis II
Draw a labelled diagram of the ultrastructure of a prokaryote.
Explain the process of DNA replication.
Outline how the structure of the ribosome is related to its function in translation.
The figure shows a tripeptide.
Label one peptide bond in this molecule.
Describe the secondary structure of proteins.
Outline the action taken by the diaphragm during inhalation.
Draw a diagram of a prokaryotic cell.
Outline the structure of the nucleosomes in eukaryotic chromosomes.
Explain how DNA replication is carried out by eukaryotes.
The diagram shows parts of a DNA molecule.
Label the parts of the DNA diagram indicated by I, II, III and IV.
State one role of nucleosomes in eukaryotic cells.
Outline how Hershey and Chase's experiment provided evidence for DNA as the genetic material.
State one function for a region of DNA that does not code for proteins.
Outline the role of A-site of ribosomes in translation.
Outline the role of tRNA activating enzymes in translation.
According to the induced fit model of enzyme function, which of the following statements is correct?
Gene expression in cells is regulated at various stages. During which stage does splicing of RNA occur?
Most of the DNA of a human cell is contained in the nucleus. Distinguish between unique and highly repetitive sequences in nuclear DNA.
Draw a labelled diagram to show four DNA nucleotides, each with a different base, linked together in two strands.
Explain the methods and aims of DNA profiling.