Which best statement describes an element?
a. A substance that cannot burn.
b. A substance that is soluble in both acid and base
c. A substance that is held together by covalent bonds
d. A substance that is composed of more than one kind of atom
e. A substance that cannot be broken into simpler substances by chemical reactions
e
You might also like to view...
Where does tRNA #2 move to after this bonding of lysine to the polypeptide?
A) A site B) P site C) E site D) exit tunnel E) directly to the cytosol
Amino acid sequences that are rich in lysine and protrude from the histone proteins in the nucleosome are called "tails."
A. true B. false
Which are the three main roles played by organisms in community life?
a. producer, detritivore, decomposer b. consumer, detritivore. decomposer c. producer, consumer, decomposer d. facilitator, decomposer, consumer e. realized niche, fundamental niche, habitat
All of the following are chemical mutations EXCEPT
A. hydroxylamine. B. ethyl methanesulfonate. C. nitrogen mustard. D. X-rays. E. nitrous acid.