Which of the following statements is correct regarding chromosomes in a eukaryotic cell?
A. Chromosomes are strands of RNA, tightly wrapped up, that are in the cytoplasm.
B. Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus.
C. Chromosomes are strands of RNA, loosely wrapped up, that are located everywhere in the cell.
D. Chromosomes are strands of DNA, tightly wrapped up, that are located everywhere in the cell.
Answer: B
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Which genetic map is derived from overlapping short pieces of DNA and is used to distinguish genes tens of kilobases apart?
A) Cytogenetic map B) Linkage map C) Physical map D) Sequence map
Glucose dissolves in water because it
a. ionizes. b. is a polysaccharide. c. is a polar and forms many hydrogen bonds with water molecules. d. has a very reactive primary structure. e. is an isotope
A recessive allele in tigers causes the white tiger. If two normally pigmented tigers are mated and produce a white offspring, what percentage of their remaining offspring would be expected to have normal pigmentation?
A) 25% B) 50% C) about 66% D) 75% E) about 90%
Which of the following is closest to the external surface of the kidney?
A) Renal cortex B) Renal pelvis C) Collecting ducts D) Renal medulla E) Nephron loops