Gene-splicing procedures may be performed with small loops of bacterial DNA that are not part of the main chromosome. These small DNA loops are called
A. nucleotides.
B. plasmids.
C. translators.
D. anticodons.
B. plasmids.
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Stomata close when ____ guard cells and they become ____
a. active transport pumps H+ into; turgid b. active transport of H+ stops in; flaccid c. active transport pumps H+ out of; turgid d. active transport pumps H+ into; flaccid e. active transport of H+ stops in; turgid
The secretion of each of the hormones from the anterior pituitary requires:
a. stimulation from the posterior pituitary b. that they first be made in the neurons of the hypothalamus c. neural stimulation from the hypothalamus d. releasing hormones delivered from the hypothalamus via a capillary bed e. changing levels of their hormones in the blood
A thin layer chromatogram is useful for
a. measuring the amount of photosynthesis. b. determining the amount of gas produced during photosynthesis. c. separating pigments based on their physical characteristics. d. determining the presence of sugars in a leaf.
The spindle apparatus is composed of
a. Golgi bodies. b. microtubules. c. endoplasmic reticulum. d. nucleoprotein. e. chromatids.