Biological growth involves an increase in:
a. the number of cells.
b. the size of individual cells.
c. the number of gene types in a cell.
d. both the number and size of cells.
e. both the number of cells and the number of gene types in a cell.
D
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Explain the distinction between a node and an internode
What will be an ideal response?
Answer the following statements true (T) or false (F)
1. Both embryonic stem cells and embryonic germ cells are pluripotent. 2. A myeloid progenitor cell can differentiate into immune cells of the blood and lymph systems. 3. Restriction enzymes bind to specific sequences of DNA to seal them together. 4. Most plasmids used in biotechnology contain a selectable marker such as an antibiotic-resistance (ampR) gene. 5. A genomic DNA library is derived from mRNA.
Prokaryotic ribosomes are composed of ____
a. proteins only b. proteins and DNA c. proteins and RNA d. glycolipids and DNA e. glycolipids and RNA
In the Watson-Crick model of DNA structure, the polynucleotide chains are
A. of unequal length. B. both oriented in the same direction. C. arranged with the bases on the outside. D. built with the nucleotides as the backbone. E. oriented in opposite directions.