A _____ is a small circle of bacterial DNA that contains a few genes and is separate from the chromosome
a. plasmid
b. chromosome
c. nucleus
d. double helix
A
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Design an experiment (including controls) to determine if a new kitchen chemical cleaner is mutagenic. Include in your answer how you would interpret the results
What will be an ideal response?
Answer the following statements true (T) or false (F)
1. During the energy investment phase of glycolysis there is a decrease of free energy that allows later reactions to be exergonic. 2. The ability of bread to rise is mainly a function of the CO2 produced during oxidative phosphorylation rather than that produced from fermentation. 3. The aerobic breakdown of glucose yields 34 to 38 ATP, while the anaerobic breakdown of glucose yields 20 ATP. 4. Secondary metabolites like caffeine are produced mainly from plant sources.
Humans have a gene called PDHA1, which codes for one protein that functions as an enzyme in the cell. It helps energy pathways by modifying pyruvate molecules into acetyl CoA molecules. Researchers have identified an insertion mutation in the gene, which produces an extra amino acid within the otherwise normal sequence in the protein. In this type of mutation
A. the mutation is not in DNA, but in the protein. B. the codon that mutates causes a stop codon to occur instead of the placement of an amino acid. C. the codon that mutates causes a change in the amino acid specified. D. the mutation does not occur in an existing codon. E. the mutation may be caused by an addition of three nucleotides.
What type of tissue is blood?
a. epithelial b. muscular c. connective d. adipose e. noncellular fluid