In eukaryotes, a promoter that signals the beginning of the gene and binds with the promoter typically consists of
A) rRNA and tRNA.
B) the bases TATAAA and response elements.
C) the base sequence AUG and transcription factor binding sites.
D) both DNA and RNA.
B
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Choose the item in column 2 that best matches each item in column 1.
A) diffusion and passive and active transport B) both passive and active transport C) diffusion D) active transport E) none of the listed processes F) both diffusion and passive transport G) indirect active transport H) passive transport 1) requires a specific integral membrane protein 2) dependent on solubility properties of the solute 3) requires cellular expenditure of energy 4) Keq = 1 5) Na+/glucose symport 6) Na+/K+ pump 7) exclusively involves the transfer of small, nonpolar molecules 8) applies only to ions 9) ?G° = 0 10) direction of transport is dependent upon the concentration gradient at any given point in time 11) requires ligand binding and therefore Michaelis constants can be calculated
"Tardigrada" means ____
a. tough exoskeleton b. many proglottids c. slow walker d. short digestive system e. Coelom
If you transfuse type AB blood into a patient with type A blood, the patient will raise antibodies against the B antigen on the donor's blood, but will not raise antibodies against the A antigen. Why not?
A. B and T cells that recognize the A antigen will have been removed by clonal deletion. B. Antibodies that recognize the A antigen will have been removed by the spleen. C. Antibodies that recognize the A antigen will have been removed by the bone marrow. D. Macrophages will not present the A antigen to T cells. E. Recombination of the gene for antibodies cannot produce self-reactive clones.
Gram-staining of bacteria provides all the physical characterization necessary to identify bacterial species.
Answer the following statement true (T) or false (F)