Which of the following phases of mitosis is not matched with the appropriate activities that occur during that phase?
A) anaphase: homologous pairs separate
B) prophase: nuclear membrane disappears
C) telophase: new nuclear envelope forms, and the mitotic spindle disassembles
D) metaphase: chromosomes line up in the center of the cell
Answer: A
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Griffith, a British microbiologist, used bacteria and mice to demonstrate the process of transformation. During transformation,
A. a bacterial chromosome produces an exact copy of itself. B. the nucleus of a mouse cell repairs itself when damaged by bacterial infection. C. DNA from an infected mouse cell changes bacteria from a non-pathogenic to a pathogenic form. D. genetic material is transferred from one bacterial cell to another. E. a bacterial cell is transformed into a spore during unsuitable environmental conditions.
Polypeptides (proteins) are composed of amino acids as ________ are composed of DNA.
A. genes B. RNA C. proteomes D. lipids E. metabolites
The integumentary system is most involved in ____
a. exchange of gases b. support c. outer body covering d. muscle contraction e. resistance
An organism has a mutation in the gene that codes for separase so that no functional separase can be made by this individual. What consequence would occur from this mutation?
a) Sister chromatids would separate prematurely during mitosis. b) During meiosis, sister chromatids would never separate because cohesin could not be broken down but homologous chromosomes would separate. c) Both sister chromatids and homologous chromosomes would never separate because cohesin could not be broken down. d) During meiosis, homologous chromosomes would never separate during meiosis but sister chromatids would separate.