During exercise, the blood returning to a person's heart contains hemoglobin that is about ________ saturated.
A. 97%
B. 35%
C. 3%
D. 75%
E. 22%
Answer: B
You might also like to view...
The phenomenon responsible for the ability of Corynebacterium diphtherium to produce the virulent toxin responsible for the devastating effects of diphtheria is called
A. self-assembly. B. matrix conversion. C. prion protein. D. lysogenic conversion.
Which statement is true about strain a?
Consider the pathway for the synthesis of the amino acid arginine in Neurospora:
Mutant strains of Neurospora may carry one or more mutations. Neurospora mutant strain a is grown on minimal media plus supplements as shown. Growth is shown by (+) and no growth is shown by (o). Growing strain a cells accumulate citrulline.
A) It has one mutation in ARG-H.
B) It has two mutations, one in ARG-F and one in ARG-H.
C) It has two mutations, one in ARG-E and one in ARG-H.
D) It has two mutations, one in ARG-E and one in ARG-F.
E) It has mutations in ARG-E, ARG-F, and ARG-H.
About half of all miscarriages are caused by ____
a. chromosomal abnormalities b. alcohol use during pregnancy c. cleft palate d. tobacco use during pregnancy e. illegal drug use during pregnancy
Down syndrome is characterized by:
a. single base mutations. b. the presence of 47 chromosomes per somatic cell. c. increasing risk with younger maternal age. d. the presence of an extra chromosome 18 in each somatic cell e. the same symptoms observed in each individual.