The strength of collagen comes from:
A. its triple helix structure and bundling.
B. its amino acid sequence.
C. its ability to bind to polysaccharide
molecules.
D. Answers a and b are correct.
A
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In flowering plants, a mature male gametophyte contains _____
A) two haploid gametes and a diploid pollen grain B) a generative cell and a tube cell C) two sperm nuclei and one tube cell nucleus D) two haploid microspores E) a haploid nucleus and a diploid pollen wall
To some extent, Earth's surface reflects solar radiation (in the form of heat), which is subsequently absorbed by certain ____ gases in the atmosphere, such as methane and CO2
Fill in the blank with the appropriate word.
Recognition of self versus non-self is accomplished by ____
a. macrophage function b. complement system activation c. B and T cell cloning d. the presence of MHC markers on cell membranes e. memory cell formation
How did the study of physics with Professors Doppler and Ettinghausen influence Mendel's understanding of genetics?
What will be an ideal response?