A - Ch 14
Define "Ribozyme"
RNA molecule that functions as an enzyme
Define "Mutagen"
Physical/chemical agents that can cause mutations
Mitosis is the cell cycle for ________ types of cell
Non-reproductive
A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain?
92
Mieosis is the cell cycle for ________ types of cell
Reproductive
Define/Explain "Transcription"
Transfer of info from DNA to RNA
What is the result of a missense mutation?
Amino acid produced is changed
What is eukaryotic chromatin made up of?
DNA and Proteins
What is a cleavage furrow?
A groove in the plasma membrane between daughter nuclei
Define/Explain "Crossing Over"
The exchange of homologous portions of nonsister chromatids
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Name 4 types of genetic mutations
Substitution, Silent, Missense, Nonsense, Insertion, Deletion, Frameshift
Define/Explain "Translation"
RNA is used to produce proteins
During what stage of mitosis do 2 separate sister daughter cells form?
Cytokinesis
Somatic cells in elephants have 56 chromosomes. How many chromosomes would be carried by the gametes produced by elephants?
28
During what stage of Meiosis do chiasmata form and crossing over occur?
Prophase 1
What is the function of a poly-A tail in mRNA?
It helps protect the mRNA from degradation by hydrolytic enzymes.
What is the Start codon?
AUG / Met
*IMAGE 2*
The unlettered circle at the top of the figure shows a diploid nucleus with 4 chromosomes that have not replicated yet.
What is the correct chromosomal condition for a nucleus in G1 of the cell division cycle?
E
What form of reproduction results in offspring that are genetically identical to the parent?
Asexual
*IMAGE 4*
Which phase of meiosis is represented?
Anaphase 1
How is the template strand for a particular gene determined?
Established by the presence of the promoter
*IMAGE 1*
What is the letter that corresponds to each site?
1 = E
2 = P
3 = A
Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely a _________ cell in the process of ______.
Plant cell in the process of cytokinesis
*IMAGE 3*
Which of these cells are haploid?
C and D
Fill in the blanks:
Meiosis produces a _________ cell in a(n) ___________
Meiosis produces a haploid cell in a(n) animal