The cycle of viral infection in which the viral DNA is integrated into the host's DNA is called the ________ cycle.
A. lysogenic
B. lysol
C. lytic
D. lysozyme
E. lysosome
Answer: A
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How are root nodule and arbuscular mycorrhizal symbioses similar?
A) They both use lipochitin oligosaccharide signaling factors to initiate root colonization. B) They both supply nitrogen to the host plant through nitrogen fixation. C) They both increase absorption of nutrients from soil. D) They are both required for the growth and reproduction of their host plants.
Which of the following is not evidence for the rearrangement mechanism in the immune system evolving from transposons?
A. Transposases have sequence homology to immunoglobin genes. B. The mechanism for RAG1 and RAG2 resembles the transposition mechanism. In the reaction, an intermediate is formed transiently that has hairpins at the ends of the sequences being removed. C. The fragment deleted from between the V segments during rearrangement can be inserted into DNA by RAG1 and RAG2 in vitro. D. The fragment deleted from between the V segments during rearrangement has structural similarity to transposons. E. All of the choices given provide evidence.
Organisms develop a normal morphology because cells can receive and interpret
A. extracellular positional information B. intracellular positional information C. extracellular and intracellular positional information D. extracellular positional information, intracellular positional information, and signals from other developing organisms E. signals from other developing organisms
The sequence for the processing of proteins originating outside of the cell involves which of the following?
A. Proteins are broken into fragments, transported to the rough endoplasmic reticulum, fuse with a Golgi vesicle containing class II MHCs, and this complex is transported to the plasma membrane. B. Proteins are broken into fragments within a vesicle, which fuses with a Golgi vesicle containing class I MHCs, and this complex is transported to the plasma membrane. C. Proteins are broken into fragments within a vesicle, which fuses with a Golgi vesicle containing class II MHCs, and this complex is transported to the plasma membrane. D. Proteins are broken into fragments, transported to the rough endoplasmic reticulum, combined with class II MHCs, move to the Golgi apparatus, then to the plasma membrane. E. Proteins are broken into fragments, transported to the rough endoplasmic reticulum, combined with class I MHCs, move to the Golgi apparatus, then to the plasma membrane.