10) What is the function of A) It hydrolyzes the host cell\'s DNA reverse transc
ID: 256630 • Letter: 1
Question
10) What is the function of A) It hydrolyzes the host cell's DNA reverse transcriptase in retroviruses? t uses viral RNA as a template for DNA synthesis. B) It C) It converts host cell RNA into viral DNA D) It translates viral RNA into proteins. E) It uses viral RNA as a template for making complementary RNA strands. 11.) All of the following are characteristics of the phylum Cnidaria except A) a gastrovascular cavity. B) a polyp stage. C) a medusa stage. D) cnidocytes. E) a pseudocoelom. 12)Which characteristic is shared by both cnidarians and flatworms? A) dorsoventrally flattened bodies B) flame cells C) radial symmetry D) a digestive system with a single opening E) both A and D is the correct sequence of the following four events during an animal's devele 1. gastrulation 2. metamorphosis 3. fertilization 4. cleavage A) 4,3,2,1 B)4,3,1,2 C)3,2,4,1 D) 3,4,2,1 B) 3,4,1,2 24) seed plants lack which of the following structures? A) ovules surrounded by integumentsExplanation / Answer
Answer:
10). B. It uses viral RNA as a template for DNA synthesis
Explanation:
Reverse transcription (RT) is the process by which RNA is converted into complementary DNA (cDNA) by the retroviral enzyme reverse transcriptase. A retrovirus is a virus capable of putting itsRNA genome into a host cell via RT (in order to reproduce) and is thus the source of the reverse transcriptase we use.
11). E. a pseudocoelom
Explanation: Cinadarians are acoelomates.
12). D. a Digestive system with a single opening
13). E. 3, 4, 1, 2
14). E. A large, nutritionally independent gametophyte
15). C. Archegonium; antheridium
Explanation:
In plants, the male gametangium is called the antheridium and the female gametangium is called the archegonium.
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