Which of the following organelles is involved in the modification, packaging, and secretion of materials?
A. Centrioles
B. Lysosomes
C. Golgi apparatus
D. Mitochondria
Answer: C
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Which of the following is a native protein isolated from bacteria and used to digest starches?
A) Cellulase B) Amylase C) Chymosin D) Penicillin E) Polymerase
Suppose a drop of food colouring is placed in a container of clear water. What happens to the coloured dye molecules?
a. They undergo osmosis at the top of the container. b. They diffuse to the top of the container. c. They undergo osmosis equally throughout the container. d. They diffuse equally throughout the container.
Which of the following features is common among the roundworms as well as the arthropods?
A. Segmentation is readily apparent. B. Periodically shed their outer covering. C. Radial symmetry. D. Undergo metamorphosis. E. Endoskeleton.
What are the products of semiconservative replication for a double-stranded DNA molecule?
a. One double-stranded DNA molecule consisting of one parental strand and one daughter strand. b. Two double-stranded DNA molecules, one consisting of two parental strands and the other consisting of two daughter strands. c. Two double-stranded DNA molecules, each consisting of one parental strand and one daughter strand. d. One double-stranded DNA molecule, consisting of two daughter strands.