Which of the following elements is required for the stability of cell walls?
A) zinc
B) chlorine
C) calcium
D) molybdenum
E) manganese
Answer: C
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The effect of each dominant allele of a complex trait is ____________________ and _______________
Fill in the blank(s) with correct word
Which of the following is a function of the steep Na+/K+ gradient across the cell membrane?
Provides energy for coupled transport Creates electrochemical gradient Maintains osmotic pressure All of the choices are correct.
Which of the following mechanisms of posttranscriptional regulation of gene expression can produce several different proteins from a single gene?
A: Alternative splicing B: Regulation of translation C: Protein degradation D: Protein phosphorylation E: MicroRNAs
Which of the following is NOT used as a criterion to classify viruses?
A) biochemical tests B) morphology C) nucleic acid D) size E) number of capsomeres