Can epigenetic change cause any differences between different cells in a single organism?
What will be an ideal response?
Answer: a nerve cell is quite distinct in its shape, size, and function from an intestinal cell. These differences in phenotypes are stable and are passed from one cell to another, despite the fact that the DNA sequences of all the cells are the same.
Phenotypic differences between genetically identical monozygotic twins may result from epigenetic effects.
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Transcriptional control-proteins increase the rate of transcription by binding to
A. mRNA sequences within the DNA. B. tRNA sequences within the DNA. C. operator sequences within the DNA. D. promoter sequences within the DNA. E. enhancer sequences within the DNA.
Unspecialized structures in embryos that develop into female sex organs are the
A) Mullerian ducts. B) Wolffian ducts. C) oocytes. D) Barr bodies.
Endocrine glands release ____
a. mucus b. hormones c. saliva d. milk e. tears
DNA contains two identical polynucleotide chains
a. True b. False