Why do proteins need to be folded into 3D shapes?
What will be an ideal response?
Answer: Biological activity (function) of proteins depends largely on its 3-D structure
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What is thought to help explain the evolution of the blood clotting mechanism?
a. constant mutations b. direct response to environmental factors c. gene duplication d. sharing of gene pools between species e. inbreeding
People who do not eat meat (vegetarians) must
choose their food carefully to get the necessary a. vitamins. b. minerals. c. carbohydrates. d. amino acids. e. fatty acids.
The trachea is completely surrounded by rings of cartilage, resulting in an organ that is inflexible
Indicate whether the statement is true or false
The presence of a transit sequence directs a protein from the ________ to the ________
A) cytosol; mitochondrion or chloroplast B) endoplasmic reticulum; Golgi apparatus C) cytosol; plasma membrane D) endoplasmic reticulum; nucleus E) signal recognition particle; nucleus