Adult stem cells:
A) are both only found in the bone marrow and are capable of developing into two or more cell types
B) are only found in the bone marrow
C) are harvested from an embryo
D) are pluripotent
E) are capable of developing into two or more cell types
Answer: E) are capable of developing into two or more cell types
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How is heat involved in photosynthesis and respiration?
A. It is a needed input for respiration only, and a product for photosynthesis. B. Heat is not involved in photosynthesis or in respiration. C. It is a waste product. D. It is a needed input for both reactions.
Where are proteins produced other than on ribosomes free in the cytosol or ribosomes attached to the ER?
A) in the extracellular matrix B) in the Golgi apparatus C) in lysosomes D) in mitochondria E) in the nucleolus
Modification enzymes typically methylate specific bases within the recognition sequence to prevent digestion of the nucleotide sequence by restriction endonucleases
Indicate whether the statement is true or false.
Koopman’s research on mouse meiosis showed that
a. there is a meiosis promoting gene. b. a meiosis inhibiting gene leads to retinoic acid production. c. retinoic acid prevents meiosis. d. the Cyp26b1 gene is expressed in testes but not ovaries. e. there is no effect if male mice do not have a Cyp25b1 gene.