The secondary structure of a protein forms ____
a. pleated sheets or coils
b. when pleated sheet regions fold back on themselves
c. from interactions between polypeptide chains
d. from covalent bonding between amino acids
e. a functional chromatin uni
a
You might also like to view...
This tissue gives pear flesh a gritty texture and makes seed coats hard:
a. xylem b. collenchyma c. phloem d. sclerenchyma e. parenchyma
Which of the following types of evidence supports the multiregional model for human evolution?
1.genetic markers on the Y chromosome 2.fossil evidence 3.mitochondrial DNA 4.microsatellite data 5.autosomal gene sequences
Striated muscle has light and dark bands. The light bands are called ________, whereas the dark bands are called ________
A) Z lines; M lines B) H zones; M zones C) A bands; I bands D) I bands; A bands E) M lines; A bands
The evolution of eukaryotic cells began approximately ________ years ago
A) 1 million B) 10 million C) 1.7 billion D) 3.8 billion E) 4.6 billion