A person who has two identical alleles for a particular gene is ________ for that gene.
A) dominant
B) heterozygous
C) homozygous
D) positive
C) homozygous
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Gene expression leads to the production of which of the following?
a. RNA and protein b. DNA and RNA c. polypeptides and amino acids d. protein and polypeptides
Why is common descent considered a scientific theory?
A) There is overwhelming evidence to support it from many areas of biology. B) Scientists are reasonably sure it's true, but there's little evidence to support it. C) It's an idea from more than 100 years ago and thus is not a modern idea. D) It's the only idea about life on Earth that can be tested by observation of the material universe.
Which of the following is true about restriction endonucleases?
A. They make staggered cuts on the DNA so that single-strand ends are formed that can be used to insert foreign DNA cut with the same enzyme. B. Some make a blunt cut on the two DNA strands so that there are no single-strand regions and some make staggered cuts on the DNA so that single-strand ends are formed that can be used to insert foreign DNA cut with the same enzyme. C. They make a blunt cut on the two DNA strands so that there are no single-strand regions. D. Depending on the incubation conditions, the same enzyme can either make a blunt cut on the two DNA strands so that there are no single-strand regions OR make staggered cuts on the DNA so that single-strand ends are formed that can be used to insert foreign DNA cut with the same enzyme.
The syringe contains live R strain and heat-killed S strain pneumonia bacteria
A) the mouse will stay alive B) live S strain bacteria will be detected in the mouse's blood. C) no live S strain will be detected in the mouse's blood. D) none of the above.