The human genome is estimated to contain _____ genes.
a. 10,000
b. 13,000
c. 16,000
d. 19,000
e. 22,000
Q. 2Which substances, produced as a result of genetic codes, are central to life and health because they determine which chemical changes will take place within the body?
a. glucose and hormones
b. enzymes and proteins
c. cholesterol and triglycerides
d. insulin and glucagon
e. glycogen and water
Q. 3Noncoding segments of DNA vary in composition based on _____.
a. changes in chromosomes
b. increased or decreased circulation
c. other genes
d. environmental factors
e. weight
Q. 4Noncoding segments of DNA contain _____.
a. genetic codes for protein formation
b. genetic codes for enzyme production
c. instructions for the regulation of gene activity
d. instructions for growth
e. instructions for healing
Q. 5Among individuals with particular gene types, high-fat diets increase insulin resistance and fat stores in the liver, and increase the risk of _____.
a. heart disease only
b. obesity only
c. type 2 diabetes only
d. heart disease and obesity
e. obesity and type 2 diabetes
Q. 6It is estimated that 90 of DNA alterations associated with disease are due to genes rather than gene switches.
a. True
b. False
Indicate whether the statement is true or false
Q. 7Genetic traits do not affect a person's perception of sweet and savory.
a. True
b. False
Indicate whether the statement is true or false
Q. 8Hemochromatosis is a fairly common single-gene defect disorder.
a. True
b. False
Indicate whether the statement is true or false
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