What ion needs to be released from an

endoplasmic reticulum in order for muscles to
contract?



a. sodium
b. calcium
c. phosphorous
d. oxygen
e. nitrogen


B

Biology & Microbiology

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To control a disease in a population, 100% immunization is necessary

Indicate whether the statement is true or false.

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In step 6 of the citric acid cycle, succinate + FAD fumarate + FADH2. Which statement concerning this reaction is true?

A. Fumarate is more oxidized than succinate. B. FAD is more reduced than FADH2. C. FAD is an oxidizing agent in the reaction. D. This is not an oxidation/reduction reaction, that is, no electrons have moved. E. a and c are both correct.

Biology & Microbiology

Answer the question using the accompanying figure. According to the graph, the upper mean annual temperature for

boreal forests is approximately ____oC.

a. -7 b. 2 c. 15 d. 25 e. 35

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Groups of flowers tightly clustered together are called an

a. floret b. ament c. catkin d. inflorescence e. telament

Biology & Microbiology