DNA associates very tightly with nucleosomes because
A. DNA can form covalent bonds with histone proteins.
B. negative charges on DNA are attracted to positive charges of the histone proteins.
C. the histone tails wrap tightly around the DNA double helix.
D. the amino acids of histone proteins are largely acidic, while DNA molecules are basic.
E. histone H1 tightens the coils of DNA that are wrapped around the nucleosome.
B. negative charges on DNA are attracted to positive charges of the histone proteins.
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Which of the following is/are true about endotoxins?
A. Lipid A is the toxic portion of the molecule. B. The toxic effects depend on the bacteria from which it came. C. The lipid A is immunogenic. D. They are proteins. E. The toxic effects depend on the bacteria from which it came AND they are proteins.
How are cellular respiration and organismal respiration related?
What will be an ideal response?
The process of asexual reproduction where a diploid embryo develops from an unfertilized egg or from
diploid cells in ovule tissue is called
a. fragmentation. b. protoplast fusion. c. somaclonal section. d. grafting. e. apomixis.
Each nucleotide contains
1.a five carbon sugar. 2.an amino group. 3.a sulfur atom. 4.a phosphate group. 5.both a five carbon sugar and a phosphate group.