"which of the following is false" regarding regulation of gene expression in bacteria?
a) there can be transcriptional regulation for the initiation and the amount of transcription, as well as posttranscriptional regulatory mechanisms.
b) regulated transcription is necessary; constitutive transcription, continuously transcribing genes with no regulatory control, does not occur without mutation.
c) negative control of transcription involves the binding of a repressor protein to a regulatory dna sequence, with the consequence of preventing transcription.
d) positive control of transcription involves the binding of an activator protein to a regulatory dna sequence, with the result of initiating transcription.
e) repressor proteins commonly contain dna-binding and allosteric domains.

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis