The first genetically engineered protein approved for human use was ________.
A. human testosterone
B. human insulin
C. human adrenaline
D. hemophilia factor VIII
E. human growth hormone
Answer: B
You might also like to view...
As many as one-half of Earth's plants
A. may already have gone extinct in the last 100 years. B. may be threatened with extinction at present. C. may be considered invasive species. D. are known to be medicinally useful. E. have been shown to be keystone species.
The ____ have a single, circular chromosome
a. Archaea b. Bacteria c. Archaea and Bacteria d. cyanobacteria only e. methanogens only
You have in your possession a microscope slide with meiotic cells on it and a light microscope. What would you look for if you wanted to identify metaphase I cells on the slide?
A) a visible nuclear envelope B) separated sister chromatids at each pole of the cell C) tetrads lined up at the center of the cell D) a synaptonemal complex E) a cleavage furrow
The yeast genome was sequenced more than 15 years ago, yet the total number of genes continues to be refined
The sequencing of closely related yeast species was important for validating the identity of short (less than 100 nucleotides long) open reading frames (ORFs) that were otherwise difficult to predict. What is the main reason that these short ORFs are hard to find without the genomes of other yeast for comparison? (a) Short ORFs are found only in yeast. (b) The short ORFs code for RNAs. (c) Many short stretches of DNA may lack a stop codon simply by chance, making it difficult to distinguish those DNA sequences that code for proteins from those that do not. (d) Short ORFs occur mainly in gene-rich regions, making them difficult to identify by computer programs.