In a chemical equation, the chemicals to the
left of the arrow are
a. products.
b. in greater abundance.
c. at higher energy levels.
d. reactants.
e. all of these.
D
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Answer the following statements true (T) or false (F)
1. Maternal effect genes are inherited via the mitochondria. 2. Epistasis often involves genes of an enzymatic pathway. 3. The actions of Xist result in an organism that is a phenotypic mosaic. 4. In biparental inheritance, paternal and maternal gametes provide chloroplasts to the zygote. 5. Genomic imprinting can result in offspring with identical genotypes that have different phenotypes.
Cancer cells exhibit a variety of differences from normal cells in cell adhesion, cell junctions, and cell effects on the extracellular matrix, some of which facilitate metastasis
Explain three changes found in some cancer cells related to these aspects of cell structure and function. What will be an ideal response?
RNA is believed to have preceded DNA because _____.
A. DNA contains thymine and RNA does not. B. DNA is double stranded and requires more components. C. DNA can store more protein-building instructions in less space. D. RNA can also function as an enzyme. E. RNA cannot replicate itself.
All __________________ are maternally inherited
a. plant mitochondrial genes b. plant nuclear genes c. animal mitochondrial genes d. animal nuclear genes e. plant chloroplast genes