The layer of the heart wall that is the visceral pericardium is also called the
A. endocardium.
B. myocardium.
C. epicardium.
D. chordae tendineae.
E. mediastinum
Ans: C. epicardium.
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A beer-making microbiologist noticed that no matter how long the brewing process went, 3% alcohol was the maximum produced
Hypothesize what is causing this low level of alcohol in reference to the brewer's recipe and recommend how a higher alcohol yield could be achieved. Ethanol is toxic at high concentrations, but ignore this factor to focus on microbial metabolism. What will be an ideal response?
The DNA code for glutamic acid is CTC or CTT. The code for valine is CAA or CAT. In sicklecell hemoglobin, valine is present instead of glutamic acid. Assuming a single base pair substitution has occurred, what is the mRNA code in the affected mutant?
A. CUU B. GAA C. GAG D. GUA E. GUU
How many codons exist in the genetic code?
a. 3
b. 9 c. 16 d. 64 e. 128
You find an Arabidopsis plant in your greenhouse that lacks stamens and carpels, and has two rows of petals and sepals. What happened to cause this abnormal flower development?
A. A mutation in gene C B. Mutations in gene C and gene A C. An overexpression of gene B D. A mutation in gene C and overexpression of gene E E. A mutation in gene A