In mammalian cells, depurination occurs at a high rate. As many as 1 in 105 purines are lost from DNA in a 24-hour period. What repair mechanism is used to repair the DNA?
What will be an ideal response?
The cell uses base excision repair (BER) to repair the abasic sites created by depurination.
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Contemporary hypotheses concerned with the origin
of life focus on what two characteristics of living systems? a. energy conversion and biosynthesis b. self-replication and energy conversion c. plasma membranes and self-replication d. growth and development e. adaptation and responsiveness
These molecules can directly convert extracellular signals into intracellular signals.
A. G proteins B. Adapter proteins C. Scaffolds D. Second messengers E. Membrane receptors
The outer surface of a bone is covered with a tough connective tissue called the ________
Fill in the blank(s) with correct word
If you are going to bake potatoes, and your potatoes are soft and dehydrated, they can be soaked in _______________ to make them more firm before baking.
What will be an ideal response?