Which cellular component is common to all cell types?
a. cell wall
b. mitochondria
c. cytoplasm
d. nucleus
e. endoplasmic reticulum
ANSWER: c
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The protein p53 activates genes that _____
A) increase mutation rate B) lead to higher production of growth factors for the cell C) increase the rate of endocytosis D) arrest the cell cycle
Plant and animal development share a number of features, but differ in major ways as well. Which of the following best summarizes the similarities between the two forms of development?
A) Both plants and animals develop from a process of single fertilization. B) Both plants and animals produce specialized tissues through irreversible processes of determination and differentiation. C) Both plants and animals produce gametes via meiosis followed by mitosis of haploid cells. D) Both plant and animal development depend on precise control of gene expression in time and in space.
Why is it warmer in the tropics?
a. solar rays travel more directly into the tropics b. less dust in the atmosphere above the tropics c. less water vapor in the atmosphere above the tropics d. less absorption by greenhouse gases e. all of these are reasons why the tropics are warmer
Describe how rolling circle replication can generate multimers of replicated DNA
What will be an ideal response?