Which of the following molecules is made up of codons?
a. mRNA
b. DNA
c. tRNA
d. ribosome
A
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The structure that contains the male gametophyte is called the
A. pollen grain. B. embryo. C. seed coat. D. cone.
A biofilm is often attached to a solid surface and may include all of the following EXCEPT _______.
A. bacteria B. algae C. fungi D. pili E. archaea
One method for detecting tumors in body tissue involves the use of radioactive materials to create three-dimensional images showing metabolic activity of a specific tissue. This technique is referred to as
A) magnetic resonance imaging. B) positron-emission tomography. C) mammography. D) electrophoresis. E) photodynamic therapy.
What are grana?
A) thick fluids inside chloroplasts B) convolutions of the inner chloroplast membrane C) stacks of membranous sacs D) pigments found in chloroplasts