List the components of a nucleosome

What will be an ideal response?


Histones H2A, H2B, H3, and H4 exist as two types of tetramers: (H2A)2 + (H2B)2 and (H3)2 + (H4)2.

Biology & Microbiology

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Pepsin is a digestive enzyme that _____

A) is manufactured by the pancreas B) helps stabilize fat-water emulsions C) splits maltose into monosaccharides D) begins the hydrolysis of proteins in the stomach E) is denatured and rendered inactive in solutions with low pH

Biology & Microbiology

Which of the following has the highest photosynthetic efficiency in hot and dry environments?

A. C3 plants B. C4 plants C. plants undergoing photorespiration D. plants that use oxygen to produce sugars E. plants that only produce sugar in the dark

Biology & Microbiology

Respond to statements 131–135 in reference to the four structures

of the heart listed below. a. right atrium b. left atrium c. left ventricle d. right ventricle M 131. Blood from the superior and inferior vena cava enters the heart via this structure. M 132. Blood passes to the lungs from this structure. M 133. Deoxygenated blood exits the heart from this structure. M 134. Oxygenated blood enters the heart via this structure. M 135. Blood is pumped to the majority of the body by this structure.

Biology & Microbiology

Which of the following are tiny projections of the mucosal wall?

a. microvilli b. mucins c. villi d. submucosa e. jejunum

Biology & Microbiology