The sequence of genes in each T4 virus within a population is the same but starts with a different gene at the 5' end. If each of these linear pieces is circularized, the gene sequences would be identical. The T4 DNA, therefore, is described as being ________.
A. linearly palindromic
B. twofold rotationally symmetrical
C. circularly permuted
D. a linear repeat
Answer: C
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fertilization.
a. hypocotyl b. endosperm c. seed coat d. cotyledon e. epicotyl
Answer the following statements true (T) or false (F)
1. An understanding of cellular biology is helping us find new treatments for many diseases. 2. The reason that mitochondrial DNA in most mammals is inherited from the mother only is because a sperm cell contains no mitochondria. 3. All living cells have a cell wall. 4. The Woese system of classification consists of a broad taxonomic grouping of organisms called the domain. 5. Most living cells are small in size because they need a small ratio of surface area to volume.
The three layers, or coats, of the human eye are the choroid, the sclera, and the ______
(a) Cornea (b) Retina (c) Pupil (d) Ciliary body.
What disease is caused by the Epstein-Barr virus?
A) the common cold B) rabies C) tuberculosis D) mononucleosis