Which of the following molecules are able to cut DNA molecules at specific sequences?

a. assembly enzymes
b. hydrolytic enzymes
c. restriction enzymes
d. ligase enzymes
e. repair enzymes


ANSWER: c

Biology & Microbiology

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During the shotgun approach to genome sequencing, the sequenced fragments orginate from:

A. the beginning of a gene. B. the center of a gene. C. random sites scattered across the genome. D. targeted sites scattered across the genome. E. None of the answer options are correct.

Biology & Microbiology

The female reproductive system includes all

EXCEPT which of the following? a. clitoris b. vagina c. oviduct d. ovary e. mammary gland

Biology & Microbiology

When Bradshaw and colleagues investigated the quantitative trait loci (QTL) of two species of Mimulus (Mimulus cardinalis and Mimulus lewisii), they used marker loci as a way to map the QTLs. Their results are shown in the accompanying figure

According to these results, ________. A) the differences in genotype for the majority of these QTLs explained small amounts of the variations in flower phenotypes for both species B) some of the QTLs did have pronounced effects on the flowers' phenotypes C) at least one QTL explained 90% of the phenotypic variance for each species D) All of the above.

Biology & Microbiology

Which of these groups is characterized by a lack of symmetry (neither radial nor bilateral)?

A) Cnidarians B) Chordates C) Arthropods D) Flatworms E) Sponges

Biology & Microbiology