Explain how disabling a gene and comparing phenotypes can reveal its role in a model organism.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2023–2026.
A candidate gene may be required for yeast cells to use a particular sugar. Which technique would most directly test its function? A. Measure the total mass of extracted DNA B. Increase the number of copies of a nearby non-coding fragment by PCR C. Determine…
Researchers disable a gene in a laboratory strain and compare its phenotype with an otherwise similar strain in which the gene remains active. What is the main purpose? A. To ensure that all mutations in the genome are removed B. To manufacture additional…
Researchers make mice lacking a functional tumour-suppressor gene. Which use of this model is appropriate? A. Testing a candidate treatment against tumours developing in the model B. Obtaining an intact copy of the deleted gene from those cells C. Proving that…
DNA structure and sequence affect biological function. (a) Outline how ultraviolet radiation can act as a mutagen. (b) Explain links between DNA molecular structure and its functions. (c) Describe how gene knockout is used in research. One additional mark is…
Using the graph, state how the presence of functional transporter alleles affects the measured dopamine level.
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