In the anammox reaction ________.
A. nitrogen gas is evolved
B. anaerobic oxidation of ammonia is coupled to the reduction of nitrite
C. all reactions must take place in the absence of O2
D. All of the choices are correct.
Answer: D
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One strand from each of the double-stranded RNA fragments of miRNA or siRNA is incorporated into a protein complex known as RISC, or the ____
Fill in the blank with the appropriate word.
Which animal has compound eyes?
a. protist b. insect c. cephalopod mollusk d. vertebrate e. amphibian
LHON is a mitochondrial disease caused by weak hypomorphic mutations that affect the mitochondrial electron transport chain. Among the first symptoms of the disease is blindness. People with LHON are usually homoplasmic because retinas must be homoplasmic mutant for a person to have disease symptoms. Which is true about a female who is heteroplasmic for the mutation that causes LHON? (Select all that apply.)
A) She may have children who are blind due to LHON. B) Some cells in her body are probably homoplasmic. C) She is likely to develop the disease in other parts of her body. D) All of her children will be homoplasmic for the wild-type mitochondria.
The law of segregation would predict that the F2 progeny of F1 heterozygous plants will exhibit a __________
A) 3:1 phenotypic ratio B) 9:3:3:1 phenotypic ratio C) 1:2:1 genotypic ratio D) 9:3:3:1 phenotypic ratio and 1:2:1 genotypic ratio E) 3:1 phenotypic ratio and 1:2:1 genotypic ratio