Typical fat molecules have ____ chain(s)
a. 1
b. 2
c. 3
d. 4
e. 5
C
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Which of the following statements is false?
a. Connective tissue of the cervix weakens during the final weeks of pregnancy. b. It is not possible for a woman to become pregnant after engaging in intercourse if the male does not ejaculate. c. The rupture of the amniotic sac with the release of its fluid is one of the events that usually precedes birth. d. After the baby is born, uterine contractions continue so that the placenta is expelled. e. Just as females should examine their breasts each month for possible lumps, males should also self-examine their testes for lumps that possibly indicate cancer.
In the past, oxygen uptake in a patient was measured as a means of determining whether a certain endocrine gland was working properly. Which of the following glands was this method most likely assessing?
A) pineal B) thyroid C) testes D) parathyroid
Sxl protein mediates differential expression of genes further downstream in the developmental pathway
In females, active Sxl protein produced from Pm leads toproduction of proteins that facilitate female development—first Tra protein, which then, with Tra-2, facilitates splicing of the mRNA for active Dsx protein. In males: A. the absence of Sxl leads to a different splicing pattern of tra transcripts; a different version of Dsx isproduced that leads to male development. B. transcription from promoter Pe results in acharacteristic splicing pattern and the production of a burst of active Sxl protein. C. only stop codons are recognized, leading to splicing of Tra and overactivity of SxI. D. the start codons are preferentially removed in splicing, causing a premature termination of Dsx translation leading to male development.
What two gases have a profound effect on the type of organisms that can live in an area and influences the regions carrying capacity?
a. Carbon dioxide and nitrogen b. Carbon dioxide and bicarbonate c. Oxygen and carbon dioxide d. Oxygen and nitrogen