In his work with pneumonia-causing bacteria and mice, Griffith found that __________.

A. heat-killed pathogenic cells caused pneumonia
B. the protein coat from pathogenic cells was able to transform nonpathogenic cells
C. the polysaccharide coat of bacteria caused pneumonia
D. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic


Ans: D. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic

Biology & Microbiology

You might also like to view...

A DNA microarray is ____

a. used for gel electrophoresis b. used identifying fragments of genes using a labeled probe c. linked to self-replicating vectors to create recombinant DNA molecules d. a series of long mRNA sequences placed on a solid support and has several uses e. a series of short nucleotide sequences placed on a solid support and has several uses

Biology & Microbiology

At rest, a nerve cell has a high concentration of

__________ inside and a high concentration of __________ outside. a. acetylcholine; chlorine b. sodium; potassium c. potassium; sodium d. calcium; phosphorous e. phosphorus; calcium

Biology & Microbiology

Ecological models can be mathematical or they can be verbally descriptive

Indicate whether the statement is true or false

Biology & Microbiology

Which of the following spores are sexually produced?

A. zygospores B. sporangiospores C. blastospores D. arthrospores E. chlamydospores

Biology & Microbiology