What is the proposed relationship between fibrinogen and casein?
What will be an ideal response?
Answer: Casein or milk protein is thought to have been derived from the gene coding for the -chain of fibrinogen. Evidence to support this hypothesis comes from sequence similarities between the two proteins (and genes) and well as from the observation that primitive mammary glands produce a milk primarily derived from presynthesized components of the blood, including fibrinogen.
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Vesicles are formed from
A) cell membrane. B) mitochondrial membrane. C) lysosomal membrane. D) nuclear membrane.
Tactile receptors composed of capsules that surround a core of collagen fibers intertwined with dendrites are called
A) Ruffini corpuscles. B) lamellar corpuscles. C) tactile (Meissner) corpuscles. D) tactile discs. E) root hair plexuses.
The condition called ________ is especially dangerous because the ureters or renal blood vessels can become twisted or kinked during movement
A) polycystic kidney disease B) floating kidney C) pyelonephritis D) renal calculi E) renal failure
Define, compare, and contrast each term listed and explain how the terms are related to each other: rough endoplasmic reticulum, smooth endoplasmic reticulum, ribosomes, and Golgi body.
What will be an ideal response?