What is the main function of DNA helicase in DNA replication?
A. Proofreading the DNA molecule
B. Adding complementary DNA bases to the newly forming DNA strand
C. Fusing DNA fragments together
D. Unzipping the DNA double helix
Answer: D
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Characteristics between the branch points of a cladogram that are shared by all organisms above the branch point and are not present in any below it are called
A. homologous characters. B. homoplastic characters. C. ancestral characters. D. derived characters. E. novel characters.
Mercury in mercurochrome inhibits growth
A. through competitive inhibition. B. through a reversible action. C. by oxidizing the sulfhydryl groups in cysteine. D. by changing the shape of proteins. E. by oxidizing the sulfhydryl groups in cysteine AND by changing the shape of proteins.
Which statement is not true?
a. Nodes are present on horsetails. b. The rhizome on horsetails bears roots. c. The internode of a horsetail is the region where the leaves are attached. d. Horsetails are members of the subphylum Sphenophyta.
Scientists mostly agree that viruses are not technically living things. Defend this position based on what you know about what viruses are and how they work
What will be an ideal response?