Stack of chlorophyll-containing thylakoids in a chloroplast.

What will be an ideal response?


Granum (grana)

Biology & Microbiology

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The two most abundant ions in plasma are ____

a. HCO3? and Ca2+ b. HCO3? and Cl? c. Na+ and Ca2+ d. Na+ and Cl?

e. Na+ and K+

Biology & Microbiology

During daylight hours, primarily

a. Pr absorbs red light and is converted to Pfr. b. Pr absorbs far-red light and is converted to Pfr. c. Pfr absorbs red light and is converted to Pr. d. Pfr absorbs far-red light and is converted to Pr. e. Pfr is converted to Pr.

Biology & Microbiology

The end product of a biosynthetic pathway often acts to block the initial step in that pathway. This phenomenon is called

A) substrate activation. B) feedback inhibition. C) allosteric activation. D) denaturation. E) irreversible inhibition.

Biology & Microbiology

Which human activity is NOT a threat to biodiversity?

A) Application of synthetic fertilizers B) Importing pigs and goats in Hawaii for food C) Cattle ranching D) Building a large sugarcane plantation in a tropical rain forest E) No-till farming

Biology & Microbiology