A positive allosteric effector will ________ the activity of an enzyme while a negative effector will ________ the activity.
Fill in the blank(s) with the appropriate word(s).
increase; decrease
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In an atom, the number of neutrons determines most specifically the ________.
A. chemical properties B. chemical element C. ion state D. isotope
Which of the following lycophytes is not properly matched to its description?
A. lycopodium: grow low to the ground, have branching stems and leaves that grow in a helical pattern B. selaginella: leaves are held in a single plane giving their branched stems a distinctive appearance; many grow as epiphytes C. quillworts (isoetes): small plants that live along the margins of lakes and streams D. tree-sized lycophytes: possess a vascular cambium; these can still be found today in tropical forests in Africa
How can a fusion protein be formed?
A. by removing a portion of the gene, forming a shorter gene and therefore a shorter protein B. by site-directed mutagenesis, where a fragment is replaced with a synthetic sequence containing the altered DNA sequence C. by ligating together the sequences of two different genes, creating a new hybrid gene. When expressed, the new gene product is a fusion of the two gene products. D. by the recombination of two proteins in a bacterial cell to form a new hybrid protein E. by using oligonucleotide-directed mutagenesis to introduce mutations that cause the expressed protein to fuse to other proteins
The site where the old DNA strands separate and new DNA strands will be synthesized is called the ________.
A. rolling circle B. primer C. Okazaki fragment D. replication fork E. template