A peptide bond forms between which of these groups?
A) Carboxyl and amino
B) Phosphate and hydroxyl
C) Hydroxyl and carboxyl
D) Carboxyl and aldehyde
E) Amino and aldehyde
A
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What type of bond forms between two hydrogen molecules to form hydrogen gas?
a. Double covalent b. Triple covalent c. Hydrogen d. Ionic e. Single covalent
Which muscle type is found in the walls of body tubes and cavities of vertebrates, such as blood
vessels and the intestines?
a. cardiac b. smooth c. skeletal d. rough e. epithelial
The infinite variety of antibodies that can be generated by B cells is due to:
a. the infinite variety of genes in these cells b. the use of gene segments to produce an infinite variety of proteins c. the recombination of genes due to crossing over d. random mutations e. modifying the protein after an antigen is detected
The genetic information in viruses
A. is single-stranded DNA. B. is single-stranded RNA. C. can be DNA or RNA, and single- or double stranded. D. is double-stranded RNA. E. is double-stranded DNA.