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DNA and Replication
Chapter 12
Question | Answer |
---|---|
What type of molecule is DNA? | organic |
What is DNA made up of? | carbon |
What macromolecule is DNA? | nucleic acid |
Where is DNA located? | in the nucleus; in the chromosomes |
What does DNA stand for? | deoxyribose nucleic acid |
What are the functions of DNA? | hereditary instructions; chemical code for every trait; "blueprint" for making proteins |
What are the building blocks of nucleic acids? | nucleotides |
What three parts make up DNA? | phosphate groups, deoxyribose, nitrogen bases |
What are the nitrogen bases that are in DNA? | adenine, thymine, guanine and cytosine i |
What is the shape of DNA? | ladder, double helix |
What does Watson and Crick's DNA model loock | Slides Rotate: sugar, phosphate, sugar, phosphate Rungs: Attached to sugar |
What is the complimentary base for thymine? | adenine |
What is the complementary base for guanine? | cytosine |
what is the complementary base for thymine? | adenine |
What is the complementary base for cytosine? | guanine |
What first has to happen during DNA replication? | DNA untwists |
What do enzymes do to DNA so it can replicate? | unzip them |
What happens after the DNA is unzipped? | DNA polymerase creates corresponding base pairs |
After the DNA polymerase creates corresponding base pairs what happens to the DNA | it reforms;2 strands twist into helix |
What results from DNA replication | 2 identical strands |
What is the name of the process where DNA copies itself? | interphase |
Name the three parts of a DNA nucleotide | phosphate groups, deoxyribose sugar, nitrogen bases |
What happens during DNA replication? | chromosomes double |
When does DNA replication occur and what stage of this? | mitosis, interphase(S phase) |
what happens to the Diploid number when Mitosis occurs? | 2n to 4n |
What two pieces of a nubleotide alternate as the backbone of DNA? | Phosphate groups and deoxyribose |
Of what are the DNA rungs comprised? | nitrogen bases |
What is produced from replication? | 2 identical strands |
Which nitrogen bases are pyrimidine? | thymine, cytosine, and uracil |
Which nitrogen bases are purine? | adenine and guanine |
What are the three types of RNA? | messenger RNA, Ribosomal, and transfer |
What is the function of mRNA? | carry instructions |
What is the function of ribosomal rna | combines with proteins |
What is the function of transfer RNA | brings amino acids to ribosome |
Where does mRNA perform its function(how)? | it carries instructions from DNA to the ribosome |
Why does ribosomal RNA combine with proteins? | to make up ribosome |
What are the two stages of protein synthesis? | transcription and translation |
Where does transcription occur? | in the nucleus |
Where does translation occur? | in the ribosome |
What happens during transcription? | mRNA retrieves DNA message to make proteins |
what happens during translation? | |
What does RNA stand for? | ribonucleic acid |
What type or molecule is RNA and what is it made of? | organic molecule-made of carbon |
What type of macromolecule is RNA? | nucleic acid |
That are the three types of RNA? | transfer, messenger and ribosomal |
What is different about the structure of DNA vs. the structure of RNA? | DNA is double-stranded; RNA is a single strand |
What is different about the type of sugar in DNA and RNA? | DNA has deoxyribose sugar, RNA has ribose sugar |
What is different about the nitrogen bases in DNA versus RNA? | Uracil replaces thymine in RNA |
What is different between DNA and RNA/size? | DNA is a very large molecule, RNA is a small molecule |
What is produced from DNA during transcription. | mRNA |
Where does transcription? | mucleus |
What are the three steps to transcription? | DNA untwists, DNA unzips, and mRNA codons line up |
What is a codon | 3 nitrogen bases on mRNA |
If there are 9 nitrogen bases in a DNA strand, how many codons are there? | 3 |
RNA has what instead of thymine? | uracil |
What molecule provides instructions to make proteins | tRNA |
What type of RNA receives a copy of the instructions to make proteins? | mRNA |
What base replaces thymine in RNA? | Uracil |
What is the mRNA base for the DNA base adenine? | uracil |
What is translation | conversion of the message (mRNA code) |
Translation converts a message into what? | a protein |
Where does translation occur? | in the ribosome |
What is a polypeptide? | a chain of amino acids |
What happens during translation? | mRNA arrives at ribosome, tRNA picks up AA and delivers it to the ribosome |
What are the three types of RNA? | ribosomal, messenger and transfer |
When the anticodon for tRNA arrives at the ribosome, what does tRNA deliver | amino acids |
What is always the start codon | aug |
What are the jobs or RNA polymerase? | unzips DNA |
Every protein in the body starts with what? | AUG |
What does transfer RNA transfer? | amino acids |
What does the mRNA attach to? | ribosome |
Where does translation begin? | at AUG start codon |
tRNA anticodons match to what ? | mRNA codons |
Why does tRNA carry amino acids | to build proteins |
What does the ribosome join during translation? | amino acids |
What happens to the tRNA during translation? | it breaks away |
During translation, the ribosome does what after joining amino acids? | moves along mRNA and continues to bind amino acids |
What codon completes the polypeptide? | the STOP codon |
What process produces four genetically different cells? | meiosis |
List the three parts of a DNA nucleotide? | deoxyribose, nitrogen bases, and phostphate groupds |
Which RNA;s are involved in protein synthesis? | tRNA and mRna |
What are the two products of photosynthesis? | oxygen and high energy sugars |
How many codons are needed for three amino acids? | 3 |
Cells of eukaryotes perform certain functions because of gene regulation. What is this called? | cell spcialization |
what is the building block of a starch? | simple sugar |
What are the building blocks or RNA? | ribose sugar, nitrogen bases, and phophate groups |
What type of cell lacks a nucleus? | prokaryote |
If a parent cell has 8 chromosomes, how many will its daughter cells contain after mitosis? | 4 |
What process copies DNA? | DNA replication |
What sugar does RNA contain | ribose |
What do genes contain instructions to make? | proteins |
The cell uses information from mRNA to make proteins during what stage? | transcription |
Why can an amino acid be specified by more than one codon? | more codons that amino acids |
What is a mutation involving as single nucleotide called? | point mutation |
Which type of mutation is never a frameshift? | single substitution |
What is produced from transcription? | mRNA? |
What base does RNA contain that is missing in DNA? | uracil |
What principle states that genes for different traits separate without influencing each other | independent assortment |
Which structure serves as the cell's boundary from the environment? | membrane |
What is the start sie for RNA polymerase called? | Promoter |
What has one allele of each gene? | gametes |
If a DNA strand has the following bases: GCATTA, what would it produce after replication? | CGTAAT |