Explain why unequal crossing over can occur between different genes with related exons
What will be an ideal response?
Ans: The related exons provide a point of homology for misalignment of homologous chromosomes. Crossing over then generates duplication in one recombinant chromosome and deletion in the other.
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Transcomplementation is a name sometimes given for a test to see whether a gene from one organism can "rescue" a loss-of-function mutant of a different organism with a homologous gene. To which of the following processes might this term apply?
A) replacement of a nonfunctional globin gene with a globin pseudogene B) substitution of a drought-resistant gene from potato plants with a drought-resistant gene from a cactus species C) introduction of a human WEE1 gene into a yeast culture with wee1- mutants D) replacement of a cdc25– with a cdc13+ gene to rescue a cell cycle dysfunction E) use of Drosophila heat shock gene promoters to regulate heat shock genes in fugu
Oxygen has an atomic mass of 16 and an atomic number of 8. How many neutrons are present?
A. 24 B. 4 C. 8 D. 16
Which two are primary complexes for protein synthesis and degradation in eukaryotes?
A. ribosomes and proteasomes B. ribosomes and lysosomes C. proteases and lysosomes D. proteases and proteasomes E. ribosomes and mRNA
Enzymatic reactions convert products into substrates
a. True b. False Indicate whether the statement is true or false