What kind of bond is formed between the 5? phosphate group of one nucleotide and the 3? hydroxyl (OH) group of the adjacent nucleotide?
A) ionic bond
B) phosphodiester bond
C) hydrogen bond
D) disulfide bond
E) hydroxyl bond
B
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The cell wall of Gram-positive bacteria
A. contains a thin layer of peptidoglycan. B. contains a thick layer of peptidoglycan. C. is, due to its thickness, an excellent barrier to most molecules. D. contains an outer membrane containing LPS. E. contains a thin layer of peptidoglycan AND contains an outer membrane containing LPS.
Biological nitrogen fixation is carried out ________.
A. only by a limited number of prokaryotes B. only in totally anaerobic environments C. only by prokaryotes in symbiotic relationships with plants D. by prokaryotes and some protists
Characterize second messengers
What will be an ideal response?
When an individual has two different alleles for a given gene they are
1.heterozygous. 2.homozygous. 3.monohybrid. 4.an F1. 5.an F2.