Translation always occurs on which of the following structures?
a. Ribosomes
b. Endoplasmic reticulum
c. Nuclear envelope
d. Mitochondria
Ans: a. Ribosomes
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Which of the following regions of a structural gene contains the information that specifies an amino acid sequence?
A. promoter region B. transcribed region C. terminator D. regulatory sequence E. enhancer region
Arabidopsis plants with a mutation in the gene embryonic Flower (EMF) produce flowers almost immediately after germination, before shoot growth occurs. What is the normal role of this gene?
A. The wildtype EMF allele causes growth of flowers in the embryo. B. The wildtype EMF allele causes death of the shoot tissue. C. The wildtype EMF allele prevents flowering from happening too soon. D. The wildtype EMF allele prevents phase change and facilitates flower determination.
Humans cultivate rice, wheat, rye, oats, and barley for their nutritious seeds. What part of the seed is traditionally used in flour for baking?
a. seed coat b. sporophyte c. endosperm d. embryo e. fruit
Fuels used in cars, and the carbon dioxide cars emit, were originally carbon dioxide
A. fixed by vascular and nonvascular plants during photosynthesis about 300 mya. B. fixed in the tissues, decayed from dinosaurs after the Cretaceous mass extinction. C. released from volcanoes, and accumulated over centuries. D. trapped in rocks and compressed into oil and coal, during the Precambrian. E. trapped in the ocean and secreted into large coral reef structures, during the Mesozoic.