Escherichia coli belongs to the
A) proteobacteria.
B) gram-positive bacteria.
C) green sulfur bacteria.
D) spirochetes.
E) actinomycetes.
A
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Which protist group possess a crystalline rod in their flagella?
a. ciliates b. diatoms c. euglenoids d. water molds e. zooxanthellae
There are between 20,000 and 25,000 genes in the human genome, yet our cells are capable of producing more than 90,000 different proteins. How is this possible?
A) Introns are spliced back together to form mRNAs. B) Micro-RNAs can also be used to make proteins. C) Primary transcripts can be edited in different ways by alternative splicing to produce different mRNAs. D) Many genes are actually yet to be discovered.
With which of the following statements concerning the dark reaction of photosynthesis would you agree?
What will be an ideal response?
Which of the following structures consists mainly of white matter?
A. Corpus callosum B. Cerebral cortex C. Thalamus D. Caudate nucleus E. Broca area