Which statement about hemoglobin is true?
A. Each globin chain on a hemoglobin molecule contains a heme group.
B. Hemoglobin is a complex protein made of 5 chains of amino acids called globins.
C. Each hemoglobin molecule can carry five oxygen molecules.
D. The cytoplasm of white blood cells contains hemoglobin.
Answer: A
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Which of these is the correct sequence from simple to more complex?
A) Carbon, nitrogenous base, nucleotide, DNA, chromatin B) Carbon, nucleotide, nitrogenous base, chromatin, DNA C) Chromatin, carbon, nucleotide, nitrogenous base, DNA D) Carbon, nitrogenous base, nucleotide, chromatin, DNA E) Chromatin, DNA, nucleotide, nitrogenous base, carbon
During the fourth and fifth weeks
A. all organ systems have been established. B. ossification centers form. C. mother begins to feel movement. D. limb buds appear.
What is the difference between neurons and neuroglia?
What will be an ideal response?
B. NaIdentify each of the following as an element (A) or a compound (B).
1. CO2 2. C 3. O2