In your own mulitcellular body, different cells in your body have a division of labor between them.
a. true
b. false
Ans: a. true
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The glycocalyx of a eukaryotic cell is
A. a protective mechanism against osmotic lysis. B. mostly polysaccharides. C. also called the cell wall. D. the site where many metabolic reactions occur. E. composed of many diverse proteins.
In the absence of a repressor, where will RNA polymerase bind to a prokaryotic operon to initiate transcription?
a. transcriptional start site b. operator c. promoter d. coding region
The enzyme formate dehydrogenase (FDH) splits formic acid to H2 and CO2 and is crucial to survival during fermentation because if fermentive intermediates were allowed to accumulate within the cell, the internal pH would become far too ________ to support viability.
A. alkaline B. acidic C. hypertonic D. hypotonic
What is the difference between an ionic and covalent bond?
A) Ionic bonds form between atoms of different elements; covalent bonds form between atoms of the same element. B) In an ionic bond, one atom has more electronegativity than the other; in a covalent bond, the atoms have the same electronegativity. C) Ionic bonding involves the inner electron shells; covalent bonding involves the valence electron shell. D) In an ionic bond, one atom accepts electrons from the other; in a covalent bond, a pair of atoms share electrons.