You are interested in the minimum set of genes necessary for survival of a eukaryotic microorganism such as Saccharomyces cerevisiae. Design an experiment to systematically test which genes are essential for survival and which are not under high nutrient,
What will be an ideal response?
Answer: The genome of S. cerevisiae can be either haploid or diploid. Genes can be systematically mutated or disabled (knocked out) in S. cerevisiae in the diploid state. Then each mutant can be tested for viability in the haploid state. Any mutant that dies in the haploid state had a mutation in a critical survival gene. Any mutant that survives in the haploid state had a mutation in a gene unnecessary for survival.
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Passive immunization ____
a. involves exposure to antigens b. is an innate immune response c. passive immunization is given only to adults d. results in memory cell formation e. involves receiving antibodies from another individual
Which property of water would help to account for how an individual who is exercising and producing excessive heat can maintain a constant body temperature?
a. Water has high heat capacity. b. Water is less dense than ice. c. Water is a good solvent. d. Water is cohesive. e. Water molecules form by covalent bonding.
What property of Archaea differentiates it from bacteria?
A) They live in the soil. B) The lack of peptidoglycan. C) The lack of a nucleus. D) They are noncellular.
Pathogenic bacteria are becoming increasingly deadly as
Select one: a. humans refuse to wash their hands frequently enough. b. antibiotic resistance builds when more and more humans take unnecessary antibiotics. c. they pick up genes from humans, allowing them to fool human body cells into thinking that they are harmless. d. humans lose their natural immunity to many pathogens through lack of exposure. e. there are an increasing number of side effects from antibiotics.v