Polygenes are involved in determining ________
A) traits that are strictly determined by environmental factors
B) continuously varying traits
C) traits that are strictly determined by genetic variance
D) traits that have a distinct all or none phenotype
Answer: B
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Which enzyme inserts nucleotides at the V-J junction to add further diversity?
A. DNA polymerase B. Terminal deoxynucleotidyl transferase C. RAG enzymes D. Reverse transcriptase
During plant cell cytokinesis, what is the name of the structure that forms between the daughter cell nuclei and eventually will become the new cell wall?
A) Constriction ring B) Kinetochore C) Cell plate D) Vesicle wall
When a T2 bacteriophage infects an Escherichia coli cell, which part of the phage enters the bacterial cytoplasm?
A) the whole phage B) only the RNA C) only the DNA D) the protein "head" and its enclosed nucleic acid
What is the explanation for why B cells come in so many different types that can produce so many different antibodies?
A) B cells can regulate shape to match the antigen. B) The genome of B cells is much larger than other body cells. C) B cells can recombine their genes with T cells. D) B cells can recombine their genes with the pathogen. E) B cells have gene fragments that can shuffle or recombine.