Helicases are enzymes that
A) Catalyzes the addition of new nucleotides on 5' -3' strands of DNA.
B) Catalizes the sealing together of short stretches of nucleotides in discontinuous strands.
C) Catalyses are breaking of hydrogen bonds between base pairs in the DNA molecules.
D) Catalyses the rewinding of the two DNA molecules after replication.
Ans: C) Catalyses are breaking of hydrogen bonds between base pairs in the DNA molecules.
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Water enters the spongocoel through the osculum
Indicate whether the statement is true or false
Prostaglandins are involved in the regulation of all of the following processes except:
a. increasing the permeability of capillaries. b. inducing labor in pregnant women. c. regulating blood pressure. d. promoting the healing of ulcers. e. causing inflammation.
Urine flows from the ureters directly into the urethra
____________________ Indicate whether the statement is true or false.
Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues but lacks organs; has no head, body cavity, or segmentation; and has radial symmetry. To what phylum does this animal belong?
A) Cnidaria B) Mollusca C) Annelida D) Platyhelminthes E) Porifera