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Cell Biology
When a cell synthesizes a protein, does it matter whether the mRNA comes from a maternal or a paternal allele of the gene that codes for the protein?
Cell Biology
INSIDE ALL LIVING CELLS THE ENERGY IS TRANSPORTED IN THE FORM OF WHICH OF THESE?:
GLUCOSE
ATP
FRUCTOSE
DNA
FATTY ACIDS
GLUCOSE
ATP
FRUCTOSE
DNA
FATTY ACIDS
Cell Biology
(a) A leafy shoot can be sealed inside a transparent container. The concentration of oxygen in the atmosphere within this container can be measured. In the dark, the oxygen concentration falls. At high light intensities, the oxygen concentration increases. At a particular light intensity, the oxygen concentration in the container remains constant.
Use the figure above to explain how it is possible for the oxygen concentration to remain constant.
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Use the figure above to explain how it is possible for the oxygen concentration to remain constant.
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Cell Biology
Beadle started his career working on Drosophila, but changed his study system to bread mould (Neurospora crassa) for his studies in biosynthetic pathways. Why might it be easier and less time-consuming to use bread mould (a haploid organism) to study the effects of induced mutation on enzyme function?
and
Describe the minimal suite of genes that must be encoded by a non-enveloped virus with an RNA genome. Explain why these need to be encoded and others do not.
and
Describe the minimal suite of genes that must be encoded by a non-enveloped virus with an RNA genome. Explain why these need to be encoded and others do not.
Cell Biology
The Central Dogma of Molecular Biology describes the flow of information in a cell. Briefly name and describe the two key processes that the cell performs in order to transmit and utilize genetic information. A full answer should include naming the template and the end product of each process, and the location of each process inside a eukaryotic cell.
and
Researchers have identified mutations in the coding region of the lacI gene that lead to a change in the structure of the lacI repressor protein. In these mutants the lacI protein’s allolactose binding pocket is now permanently in the ‘bound’ state. Explain fully what consequence, if any, this will have on the production of lacZ protein in the mutant E. coli cells.
and
Researchers have identified mutations in the coding region of the lacI gene that lead to a change in the structure of the lacI repressor protein. In these mutants the lacI protein’s allolactose binding pocket is now permanently in the ‘bound’ state. Explain fully what consequence, if any, this will have on the production of lacZ protein in the mutant E. coli cells.
Cell Biology
What is more likely to have a detrimental effect on the phenotype: a 1bp base pair deletion from the middle of the coding sequence of a gene, or a 9 base pair deletion from the very 5’ region of the coding region of the gene? Fully explain why? Would the outcome be different if the deletions happened within the gene’s intron? Why?
Cell Biology
Describe the anatomy, function and physiology of female and male reproductive systems, explain the process and regulation of oogenesis and spermatogenesis and apply it to the process of fertilisation, pregnancy and childbirth
Cell Biology
What causes swelling in organelles and irreversible damage to cell?
Cell Biology
When the _____ is mature, the sporangium opens.
Cell Biology
at x10 objective lens what is one eyepiece unit
at x 40 objective lens what is one eyepiece unit.
follow this format
... eyepiece divisions = ... stage divisions
100 stage divisions = 1mm
1 stage division = 0.01mm
.. stage divisions = ...mm
...eyepiece divisions = ...mm
1 eyepiece division = ....mm or ... µm
at x 40 objective lens what is one eyepiece unit.
follow this format
... eyepiece divisions = ... stage divisions
100 stage divisions = 1mm
1 stage division = 0.01mm
.. stage divisions = ...mm
...eyepiece divisions = ...mm
1 eyepiece division = ....mm or ... µm
