Phytochemicals are
a. essential for survival.
b. produced in laboratories exclusively.
c. not essential but can prevent some
disorders.
d. cofactors for cellulose degradation.
e. none of these
C
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Although Cyanobacteria contribute more than 35% of all photosynthesis on Earth, they are not visible in the natural environment
Indicate whether the statement is true or false.
Which of the following statements about differentiated cells is not correct?
A. Transfer of a nucleus from a fully differentiated cell into an unfertilized egg with no nucleus can support the development of an entire organism. B. Cells become differentiated because of changes in nuclear gene expression. C. Cells become differentiated because genes that are not being expressed are deleted. D. Differentiated cells contain a complete genome. E. Mammals have been cloned from completely differentiated cells.
What type of animal is most likely a thermoconformer?
a. eagle b. monkey c. shark d. elephant e. penguin
During the termination stage
a. a STOP codon enters the ribosome. b. release factors bind the ribosome. c. mRNA detaches from the ribosome and the polypeptide chain. d. ribosomal subunits separate. e. all of these occur