The purpose(s) of two circuits in a closed circulatory system is to ____
a. collect and distribute blood within the heart
b. take blood to and from all parts of the body
c. take blood to and from the lungs
d. keep oxygenated and deoxygenated blood separate
e. allow oxygenated and deoxygenated blood to mix
ANSWER: c
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The cycle in which lactate is removed from muscle tissue and returned to the liver to produce glucose is called
A) gluconeogenesis. B) glycolysis. C) fermentation. D) the Calvin cycle. E) the pyruvate recovery cycle.
What is one difference between DNA replication in bacteria versus eukaryotes?
A) Eukaryotic chromosomes are replicated bidirectionally, while bacterial chromosomes are replicated in one direction. B) Eukaryotic chromosomes have many origins of replication and replicate bidirectionally, while bacteria have only one origin of replication and replicate unidirectionally. C) Bacterial chromosomes are replicated bidirectionally, while eukaryotic chromosomes are replicated in one direction. D) Eukaryotic chromosomes have many origins of replication, while bacteria have only one origin of replication. E) The process is identical in bacterial and eukaryotic DNA replication.
Which of the following is not a difference between prokaryotic and eukaryotic gene expression?
A. In prokaryotes, transcription and translation can be done simultaneously. B. Eukaryotic mRNAs are extensively processed before translation. C. Prokaryotic mRNAs have very short half-lives. D. Bacterial mRNAs contain no untranslated regions. E. Prokaryotic mRNAs may be polycistronic.
Which kind of root system consists of a large central root and numerous lateral roots?
A) needle-like B) spinous C) taproot D) fibrous