Which of the following organelles plays an important role in phagocytosis (a type of endocytosis), contains a variety of digestive enzymes, and has transport pumps that maintain an acidic pH inside the organelle?
a) lysosomes b) Golgi complex c) peroxisomes d) mitochondria e) proteasomes
a) lysosomes
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A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of the heavier fractions could produce ATP in the light
, whereas organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions are most likely to contain, respectively, _____. A) mitochondria and chloroplasts B) chloroplasts and peroxisomes C) peroxisomes and chloroplasts D) chloroplasts and mitochondria E) mitochondria and peroxisomes
P700 is located in photosystem ____ and is comprised of chlorophyll ____
a. I; b b. I; a c. II; b d. II; a e. I and II; a
If the number of chromosomes in an animal's gametes is 20, then a somatic cell from that animal
would contain ____ chromosomes.
a. 5 b. 10 c. 20 d. 40 e. 80
Chromosomes that do not determine the sex of an individual are called ______.
A. autosomes B. sex chromosomes C. nonhomologous chromosomes D. homologous chromosomes