The amino acids of the protein keratin are arranged predominantly in an ?-helix. This secondary structure is stabilized by _____
A) covalent bonds
B) peptide bonds
C) ionic bonds
D) polar bonds
E) hydrogen bonds
Answer: E
You might also like to view...
How might a change of one amino acid at a site, distant from the active site of an enzyme, alter an enzyme's substrate specificity?
A) by changing the enzyme's stability B) by changing the enzyme's location in the cell C) by changing the shape of an enzyme D) by changing the enzyme's pH optimum E) An amino acid change away from the active site cannot alter the enzyme's substrate specificity.
Survivorship may be defined as the probability of newborn individuals of a cohort surviving to a particular age interval or as the proportion of the population surviving from the previous age interval.
Answer the following statement true (T) or false (F)
Which of the following sources of alternative energy involves using uranium or other materials to split the nucleus of an atom?
A. hydroelectric energy B. wind turbines C. nuclear energy D. geothermal energy
In dandelions, female gametophytes and their eggs are ________ because during megaspore generation, homologous chromosomes do not pair and ________ does not occur.
A. haploid; meiosis II B. diploid; meiosis I C. haploid; meiosis I D. diploid; meiosis II