Golden rice:
a) could help the 250,000 children each year who are at risk of blindness due to vitamin A deficiency.
b) supplies more protein.
c) grows without a husk, thereby reducing the processing required before it can be consumed.
d) supplies more vitamin A in one serving than an individual needs in a full week.
e) can make vitamin A without beta-carotene.
Ans: a) could help the 250,000 children each year who are at risk of blindness due to vitamin A deficiency.
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A scientist fused a mouse cell and a human cell, then treated the cell with specific antibodies
covalently linked to fluorescent dyes (antibodies to mouse proteins--green; antibodies to human proteins--red). Forty minutes later, the researcher looked at the fused cell and observed ____.
a. the cell was still half red and half green. b. the red and green fluorescent labels were uniformly distributed across the entire membrane c. the red and green labels were distributed in intermingled patches d. the red and green labels flashed intermittently e. the red and green labels were distributed in a swirling pattern
In a cell, the rate at which an enzyme will encounter its substrate depends on which of the following?
A.) the way that the cytosol is structured B.) the concentration of other proteins in the cytosol C.) the size of the enzyme D.) the concentration of the substrate
The best explanation for the phenotypic differences between humans and chimps despite the great similarities in their gene-coding sequences is
A. the vast differences in the introns between their genomes. B. differences in gene expression between species. C. the vast differences in exons between their genomes. D. the junk DNA of humans contains important sequences not present in chimps.
The conversion of amino acids to carbohydrates is an example of
A. amination. B. gluconeogenesis. C. substrate-level phosphorylation. D. beta-oxidation. E. electron transport.