When carbon and oxygen bond they do so by sharing electrons, but the electrons spend most of their time orbiting around oxygen. What type of bond forms between these two atoms?
covalent
ionic
polar covalent
hydrogen
The Correct Answer is C
A. covalent: This is too general. Covalent bonds involve shared electrons, but do not specify if sharing is equal or unequal.
B. ionic: Ionic bonds involve transfer of electrons, typically between metals and nonmetals. Carbon and oxygen share electrons.
C. polar covalent: A polar covalent bond involves unequal sharing of electrons. Electrons spend more time around oxygen because it is more electronegative than carbon.
D. hydrogen: A hydrogen bond is an intermolecular force, not a bond between carbon and oxygen atoms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. anaphase – sister chromatids are pulled to separate ends of the cell: During anaphase, sister chromatids separate and move to opposite poles.
B. metaphase – chromosomes line up at the center of the cell: In metaphase, chromosomes align at the metaphase plate.
C. telophase – nuclear envelope is breaking down; chromosomes are condensing: In telophase, the nuclear envelope is reforming, and chromosomes are de-condensing into chromatin. The description given fits prophase, not telophase.
D. interphase – cell is going about its daily business, at the end DNA is duplicated and starts condensing: During interphase, the cell grows and replicates DNA in preparation for mitosis.
Correct Answer is C
Explanation
A. phenotype – how you express your genes: Match. Phenotype is the physical or observable expression of your genes.
B. allele – alternative forms of a gene: Match. Alleles are different versions of the same gene (e.g., dominant vs. recessive).
C. homozygous – having two different alleles for a trait: Match. Homozygous means two same alleles (e.g., AA or aa). This definition describes heterozygous.
D. genotype – the two distinct genes you have for a trait: Match. Genotype is the combination of alleles (e.g., Aa or AA) you inherit.
E. Incomplete Dominance – two alleles blend together in expression: Match. In incomplete dominance, neither allele is fully dominant, resulting in a blended phenotype.
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