All of the following are true of every cell of
the early human embryo EXCEPT that
a. each has the same genes as all the others.
b. each can give rise to an entire human.
c. they are undifferentiated.
d. all will differentiate alike.
e. all have maternal messages
D
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Identify the structure indicated by #4:
A. uterus B. cervix C. vagina D. ovary E. fallopian tube or oviduct
Answer the following statements true (T) or false (F)
1. The small intestine releases the hormone secretin in response to acid. 2. Fats packaged in chylomicrons pass directly from epithelial cells to the bloodstream. 3. In the stomach, proteins are cleaved into amino acids by aminopeptidases. 4. A person whose ancestors were cattle herders is more likely to express the lactase gene as an adult.
At which level is gene expression primarily regulated in prokaryotic organisms?
a. Transcriptional level b. Epigenetic level c. Post-translational level d. Translational level
Explain why enzyme replacement therapy cannot cure a genetic disease, and why gene therapy offers the only cure. What will be an ideal response?