Dissimilatory sulfide-oxidizers use a variety of unique ecological strategies in order to
A) avoid the toxicity of hydrogen sulfide.
B) position themselves at interfaces where sulfide and oxygen meet.
C) position themselves where there is sufficient light for sulfide oxidation.
D) find organic carbon substrates.
Answer: B
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Which of the following clusters of terms apply when addressing enhancers or silencers as elements associated with eukaryotic genetic regulation?
A) cis-acting, fixed position, fixed orientation B) trans- and cis-acting, variable position C) trans-acting, fixed position, fixed orientation D) cis-acting, variable position, fixed orientation E) cis-acting, variable orientation, variable position
Primary immunodeficiency diseases
A. develop later in life. B. are detectable close to birth. C. may be caused by malnutrition. D. are never associated with genetic defects. E. are sometimes caused by severe stress.
A bacterial cell undergoes binary fission. One of the daughter cells is normal, but the other has a mutation in the FtsZ protein, rendering the protein nonfunctional. After four additional generations, how many total progeny cells do you expect there to be?
A. 5 B. 17 C. 16 D. 32 E. 33
Although the outer mitochondrial membrane is permeable to all small molecules, the inner mitochondrial membrane is essentially impermeable in the absence of specific transport proteins
Consider this information and what you have learned about the citric acid cycle to address the following questions. A. The ATP generated by oxidative respiration is used throughout the cell. The majority of ATP production occurs in the mitochondrial matrix. How do you think ATP is made accessible to enzymes in the cytosol and other organelles? B. If the inner mitochondrial membrane were rendered aspermeable as the outer membrane, how would that affect oxidative phosphorylation? Which specific processes would stop and which remain? C. Presenttwotypes of benefits derived from separating the reactions of glycolysis in the cytosol from those that occur during the citric acid cycle in the mitochondrion. How We Know: Unraveling the Citric Acid Cycle