Two organelles that are believed to have once been free-living bacterial cells are ________ and ________.
A. peroxisomes; lysosomes
B. Golgi complex; endoplasmic reticulum
C. ribosomes; nucleolus
D. chloroplasts; mitochondria
Answer: D
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How does water enter a plant?
A. Through the roots B. Through the leaf C. Through the stomata D. Through the grana
Foods that have been unacceptably altered due to uncontrolled bacterial growth are called
A. refrigerated. B. spoiled. C. preserved. D. fermented.
The first human gene therapy was approved for patients suffering ADA (adenosine deaminase) deficiency. In this therapy, lymphocytes were removed from the patient, the normal ADA gene was put into the cells, and the cells were returned to the bloodstream. How was the normal ADA put into the lymphocytes?
A. Via the polymerase chain reaction. B. By fusing normal lymphocytes with deficient lymphocytes. C. Microinjection. D. Via a plasmid vector. E. Via a viral vector.
A fragment of DNA or RNA, labeled with a tracer, used for genetic studies is called a ________
a. probe b. genome c. cloning vector d. chromosome e. nucleotide