Choose the three best explanations for why mrs. h's alveoli might collapse if she does not do her deep breathing with the incentive spirometer. a) the alveoli are lined with water, and attraction between the water molecules pulls them together. this surface tension will pull the alveoli closed if she does not open them with deep breathing. b) when she is lying down, it is harder for her to expand her chest cavity anyway. she needs to put extra effort into it. c) the anesthesia was toxic to her lung cells, and she needs to clear it out of her alveoli as fast as she can. d)b surgery stimulated her sympathetic system, which has constricted her bronchioles and could lead to an asthma attack. e) shallow breathing that does not fill her lungs will only move air into the alveoli in the upper part of her lungs, letting those in the lower part stay closed. f) with her gall bladder removed, she cannot produce the soapy substance that lines alveoli and makes them easier to inflate.

the eggs of the insects should be the first thing collected at the scene.

false

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

    elongation: in which is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

    termination: in which is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

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