What was one of the pieces of evidence most critical to the discovery of DNA structure?
A. Its composition of four different nucleotides.
B. The discovery of its semi-conservative mode of replication.
C. An X-ray diffraction pattern suggesting a double helix shape.
D. The backbone containing sugar-phosphate linkages.
E. The hydrogen bonding between different nucleotides.
C. An X-ray diffraction pattern suggesting a double helix shape.
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Alternate forms of a gene are called ____
a. homologues b. loci c. alleles d. homozygous e. heterozygous
RNA is characterized by which one of the following features?
A. Deoxyribose B. Thymine C. Ribose D. Double-stranded
The key characteristic of a useful antimicrobial is selective toxicity
Indicate whether this statement is true or false.
In which of these animals are ingested nutrients NOT degraded by gut microbiota before reaching the small intestine?
a. sloth b. colobine monkeys c. horses d. macropod marsupials