What do we call a sequence located upstream, downstream, within the coding region, or several thousand base pairs away from a gene that increases transcription?
a. promoter
b. terminator
c. enhancer
d. repressor
c. enhancer
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Answer the following statement(s) true (T) or false (F)
1. Plants that sequester heavy metals utilize pressure-flow where they move toxins from the source (soil) to a sink (such as the leaves). 2. A magnesium deficiency would impact the light-independent reactions but not the light-dependent reaction of photosynthesis. 3. A parasitic plant without chlorophyll is likely to lack leaves. 4. A plant with 80 available ATP could produce 10 molecules of NH3. 5. Blocking the proton pumps in a root would result in a more negative membrane potential and an increase in K+ uptake.
If an organism with 64 chromosomes mates with a closely related organism with 62 chromosomes, the most likely
result will be ____.
a. many unhealthy offspring due to hybrid breakdown b. many unhealthy offspring due to hybrid inviability c. no offspring due to hybrid sterility d. sterile offspring due to hybrid inviability e. sterile offspring due to hybrid sterility
Chemical bonds that are formed when one atom with a partial positive charge (created from unequal
sharing of electrons) is electrically attracted to another atom with a partial negative charge (also created from unequal sharing of electrons) are called ____.
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
A large molecule built of three to millions of subunits is a(n)
a. monomer. b. ion. c. polymer. d. enzyme. e. functional unit.