Ribosomes are complex aggregates of
A. RNA and DNA.
B. RNA and proteins.
C. DNA and proteins.
D. RNA and sugars.
E. nucleosomes and RNA.
Answer: B
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Which of the following is not part of the P1 lytic cycle?
A. The DNAs are cut from the linear product of rolling circle replication, circularized, and then packaged into phage heads. B. When P1 DNA enters the cell, it circularizes its genomes using the Cre-lox recombination system. C. Rolling circle replication occurs, generating many copies of the phage genome as a long linear DNA. D. The cells lyse and the mature phages can infect other cells. E. All of the choices given are part of the lytic cycle.
Each turn of the citric acid cycle produces which of the following?
a. One ATP molecule b. Two carbon atoms c. One NADH molecule d. Two ATP molecules
In humans, the egg provides the mitochondria to the zygote. In plants, which organelles would be provided by the egg and not by the sperm?
A. nuclei and chloroplasts B. chloroplasts and mitochondria C. nuclei D. mitochondria E. chloroplasts
Peroxisomes are examples of
A. lysosomes. B. nucleosomes. C. ribosomes. D. chromosomes. E. microbodies.