What is meant by the description "antiparallel" regarding the strands that make up DNA?
A) The twisting nature of DNA creates nonparallel strands.
B) The 5' to 3' direction of one strand runs counter to the to direction of the other strand.
C) Base pairings create unequal spacing between the two DNA strands.
D) One strand contains only purines and the other contains only pyrimidines.
B
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Two major types of symmetry found in viruses include
A. icosahedral and helical. B. icosahedral and radial. C. helical and radial. D. radial and bilateral.
Choose the pair of terms that complete this sentence about functional groups in organic chemistry: Carboxyl is to ______ as ______ is to base.
A. acid...carbonyl B. sulfhydryl...carbonyl C. acid...amino D. hydroxyl...amino E. ketone...phosphate
What subphylum do woodpeckers and shrews belong to?
A. Animalia B. Cephalochordata C. Chordata D. Urochordata E. Vertebrata
proto-ocogenes
What will be an ideal response?