Terminal electron acceptors used by Desulfotomaculum include sulfate and sulfite, converted to hydrogen sulfide.
Answer the following statement true (T) or false (F)
True
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Antibody diversity is a consequence of
A) the huge number of antibody genes. B) shuffling of antibody genes into different combinations during B cell development. C) differential regulation of antibody gene expression under different circumstances. D) the many types of viruses that exist in nature.
Where do plants typically store their starches and sugars for later use?
A. In the leaves B. In the roots C. In the stems D. In the flowers
Crossing over happens during which phase of meiosis?
What will be an ideal response?
A mutation in the gene encoding the integrase enzyme renders the protein nonfunctional. How would this affect-the HIV infection cycle?
A. The gp120 glycoprotein would not be able to bind the CCR5 receptor. B. Reverse transcription would not be possible. C. Cutting and assembling the capsid would be halted. D. The viral DNA would not be able to integrate the viral genome into a chromosome.