The Earth has a constant tilt of _____ on its axis from its plant of orbit.
A. 12.5 degrees
B. 23.5 degrees
C. 30 degrees
D. 9 degrees
E. 5.5 degrees
Answer: B. 23.5 degrees
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Multiple alleles are common because
A) RNA is an informational molecule, and many sequences are possible for a particular gene. B) proteins are informational molecules, and many amino acid sequences are possible. C) a gene sequence can vary in different ways and still encode a functional protein. D) there are many humans on the planet.
When in the cell cycle would you find sister chromatids?
A. G1 B. S C. G2 D. Answers b and c are correct.
The coding sequence of the green fluorescent protein gene (GFP) is placed under the control of an enhancer active in neurons. When this transgene is introduced into flies, GFP will be expressed in
A) all neurons or a subset of neurons. B) all fly cells that have the transgene. C) all cells in the early embryo and then GFP will be silenced. D) all cells in the late embryo after neurons form.
The I- is transported from the blood capillaries to the lumen for the follicle cells via
a) Na/I Sympoter b) Iodide Transporter c) Na/I symporter and Iodide Transporter d) None of the above' e) All of the above