Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?
A) They are not composed of cells.
B) They are filterable.
C) They cannot reproduce themselves outside a host.
D) They cause diseases similar to those caused by chemicals.
E) They are chemically simple.
C
You might also like to view...
Which of the following is true about bacteria?
a. most bacteria are harmful b. bacteria only inhabit surfaces c. we have more bacteria cells that our own cells d. bacteria are restricted in their distribution to certain ecosystems e. bacteria are the most common organisms in the Domain Eukarya
Which of the following is NOT true of
polysaccharides? a. composed of many linked monosaccharides b. may be straight and unbranched or highly branched c. most likely made of glucose molecules if they are one of the natural polysaccharides d. may be insoluble because of their large size and structure e. are formed by cleavage reactions
A cross is made between a female calico cat and a male cat having the gene for black fur on his X chromosome. What fraction of the offspring would one expect to be calico?
What will be an ideal response?
The restriction enzyme EcoRI cuts between the G and the A of the sequence GAATTC. Which statement is true about this enzyme?
A) It will cut this sequence only in bacteriophage DNA. B) It leaves sticky ends of sequence CTTA. C) It leaves sticky ends of sequence AATT. D) It will cut this sequence only in bacterial DNA.