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Chapter 12
The Code of Life
Question | Answer |
---|---|
What is DNA? | Hereditary material found in the nucleus. |
What is a mutation? | A change in the hereditary material of an organism. |
What is a Genetic disorder? | An abnormal condition that an organism can inherit. |
What is DNA replication? | The process of a DNA molecule making a copy of itself. |
What is protein synthesis? | The production of proteins in the cell. |
What is base sequence? | The order of base pairs along a gene. |
What is a double helix? | The shape of the DNA. |
Which bases pair with each other? | Adenine (A) pairs with Thymine (T) and Cytosine (C) pairs with Guanine (G). |
Why does DNA replication? | It ensures that each daughter cell has an exact copy of the DNA from the parent cell. |
Which of type of mutation causes sickle cell anemia? | Substitution. |
What is RNA? | A shorter version of DNA that a single strand. |
What is the function of the ribosome? | It reads the codons and arranges the amino acids. |
What causes mutations? | exposure to chemicals or other environmental conditions. |
Mutations can be harmful, helpful or neutral. They may or may not cause a change in protein shape and function. | True. |
What does DNA stand for? | Deoxyribonucleic Acid |
An error in which process could result in the type of mutation that causes Down's Syndrome? | Meiosis. |
What are the backbone of DNA made of? | Deoxyribose (sugar) and phosphate. |
Name the 3 main scientists that contributed to the discovery of DNA. | James Watson, Francis Crick, and Rosalind Franklin. |
What is the procedure that doctors use to determine if a baby has a genetic disorder? | Amnioscentesis. |
When can mutations happen? | Anytime in any cell or gene. |
What are Amino Acids? | The building blocks of protein. |
What is the result of a genetic disorder? | When a mutation causes the product of a single gene to be altered or missing. |
What can too many or not enough chromosomes cause? | Down's Syndrome. |
Where is DNA stored? | In the Nucleus. |
What are the effects of Down's Syndrome? | Mental and physical limitations. |
When a base is changed in the sequence to another base? | Substitution. |
What is it called when a base is added to a codon? | Insertion. |
What is it called when a base is removed from a codon? | Deletion. |
What does passing on genetic mutation require? | both parents have the recessive allele. |
Messenger RNA (mRNA) is found in the_____. | Inside the nucleus. |
Transfer RNA (tRNA) is found in the ____. | In the cytoplasm. |
How many bases are in one codon? | Three |
Does a codon have to be exact? | Yes |
When DNA replicates there is a partial unwinding of the double helix. What happens to the base pairs? | They seperate |
When DNA replicates how are the resulting DNA molecules built? | The two resulting DNA molecules are each built from one strand of the original molecule |
RNA is different from DNA because it consists of a single strand and instead of thymine (T), RNA has the base uracil (U). | True |