Scientists often stain chromosomes from mitotic cells and photograph the chromosomes in the microscope. Each chromosome is cut out of the photograph, the chromosomes are matched up in homologous pairs and they are placed in order of decreasing size. These pictures can be used to screen individuals for chromosomal abnormalities, like extra, missing or grossly altered chromosomes. What is such a picture called?
a) prokaryote
b) eukaryote
c) karyoplan
d) karyokinesis
e) karyotype
Ans: e) karyotype
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Dinoflagellates have flagella that enable motility and occur in both freshwater and marine waters
Indicate whether the statement is true or false.
Which product(s) of the Calvin cycle is(are) exported from the chloroplast for use by the plant cell?
A. triose phosphates B. sucrose and glucose C. RuBP D. NADPH
It’s Mystery Mollusk Monday, and you’ve been given a bucket full of animals that resemble aquatic worms. Your mystery mollusks don’t have shells, tentacles, eyes, or a foot, but they do have a radula. How do you classify these animals?
a. Monoplacophora b. Solenogastres c. Caudofoveata d. Scaphopoda
Which statement is NOT correct about the lac operon?
A. It regulates the production of a series of five enzymes. B. It is normally turned off if glucose is present. C. It is an inducible system. D. The structural genes make products that allow lactose metabolism. E. Lactose binds to the repressor protein and inactivates it.