Which of the following statements is CORRECT about biomembranes?
A. The phospholipid tails interact with water.
B. The phospholipid head groups are repelled by water.
C. Electron microscopy indicates the membrane looks like train tracks with two light lines of lipids separated by a dark line containing proteins.
D. The membrane is composed of two protein layers separated by a lipid layer.
E. Membrane proteins are globular, and some span the phospholipid bilayer and project from both sides of the membrane.
E. Membrane proteins are globular, and some span the phospholipid bilayer and project from both sides of the membrane.
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Which of the following would NOT be true of cDNA produced using human brain tissue as the starting material?
A) It could be amplified by the polymerase chain reaction. B) It could be used to create a complete genomic library. C) It was produced from mRNA using reverse transcriptase. D) It could be used as a probe to detect genes expressed in the brain. E) It lacks the introns of the human genes.
Most evidence indicates that skin color is controlled by ____ gene pair(s)
a. one b. two to three c. ten d. five to seven e. fifteen
Which one of the following structures is part of the internal cytoskeleton that supports a cell?
A) rough and smooth endoplasmic reticulum B) flagella and cilia C) microtubules and microfilaments D) lysosomes and peroxisomes E) ribosomes and rough endoplasmic reticulum
All of the following contain amino acids except:
What will be an ideal response?