The interleukin-2 (IL-2) growth factor interacts with receptors on
A) embryonic cells.
B) cytotoxic T lymphocytes.
C) mesenchymal cells.
D) smooth muscle cells.
E) epithelial cells.
Answer: B
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Match the following items with the correct phrases.
_______1. A protein that plays a role in DNA replication. _______2. The end product of transcription. _______3. A protein that plays a role in transcription. _______4. The location of codons. _______5. The location of anticodons. _______6. An integral part of ribosomes, whether or not they are participating in protein synthesis. _______7. Produced in the nucleolus of eucaryotic cells. _______8. The molecule responsible for “activating” amino acids, thus enabling them to be added to the growing polypeptide chain. a. DNA polymerase b. RNA polymerase c. mRNA d. rRNA e. tRNA
All life can be divided into _____ domains and _____ kingdoms
a. three; three b. four; four c. three; four d. four; three
How many bases do deletion-insertion polymorphisms (DIPs) most frequently involve?
A) 1–2 B) multiples of 3 C) 10–100 D) more than 100
The transfer of genes from dead bacteria to live bacteria is called transformation.
Answer the following statement true (T) or false (F)