In 1964, Nirenberg and Leder used the triplet binding assay to determine specific codon assignments. A complex of which of the following components was trapped in the nitrocellulose filter?
A) ribosomes and DNA
B) sense and antisense strands of DNA
C) free tRNAs
D) charged tRNA, RNA triplet, and ribosome
E) uncharged tRNAs and ribosomes
D
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Which of the following is used to produce vaccines and antibiotics?
a. recombinant DNA technology b. gel electrophoresis c. genetic testing d. gene therapy
On the island of Madeira, two populations of house mice have accumulated different Robertsonian translocation. Which are true about these two populations of mice? (Select all that apply.)
A) They have fewer chromosomes than mice in other areas of the world. B) They are isolated from each other geographically. C) If mice from different populations mate, their offspring are sterile. D) Mice from different populations are unable to mate with each other. E) They are becoming extinct because of semi sterility.
People homozygous for the sickle-cell anemia allele develop a life threatening disease, while those homozygous for the normal allele are at the highest risk of dying from malaria. Carriers have some resistance to malaria, but do not develop sickle cell anemia. This is an example of ________
A. point mutation. B. genetic bottleneck. C. heterozygosity. D. founder effect. E. heterozygote advantage.