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*Molecular Genetics
Molecular Genetics
| Question | Answer |
|---|---|
| what is the connection between a chromatid and a replicated DNA molecule? | A chromatid is a half of a replicated chromosome (the chromosome is made up of DNA) |
| How can all organisms share the same 4 bases DNA and still be so diverse? | Bases are read in sets of three, called codons. There are 64 possible codons, which is more than enough to code for the 20 amino acids as well as the Start and Stop commands. |
| If a fly has a diploid number of 12, how many chromosomes would there be in each cell at the end of telophase of mitosis? | 24. Each is replicated, but the cell is not completely divided. |
| what is the pairing rule for deoxyribonucleic acid? | A<->T and G<-->C |
| How many chromosomes would normally be found in a human stomach cell? | 44 normal, plus 2 sex chromosomes...46 alltogether |
| ________________ are organic molecules that have the function of starting and regulating chemical reactions. | enzymes |
| Amino acids are the building blocks of: | proteins |
| There are ________ different kinds of amino acids. | 20 |
| The largest molecules in our bodies are: | nucleic acids |
| Which of the following statements is true? a)Each DNA molecule is a single gene. b)DNA molecules are in the shape of a double helix. c)mRNA molecules are in the shape of a double helix. | B |
| The human body is composed mostly of: | oxygen, nitrogen, hydrogen, and carbon |
| Which is true about DNA? a)At the beginning of protein synthesis, a section of a DNA molecule unwinds and unzips. b)All of our DNA is normally located in the nucleus of our cells. c)DNA is composed of amino acids, phosphates, sugars, and bases. | A |
| Which of the following occurs at the ribosomes? a)Most of a cell's DNA molecules are stored there. b)Proteins are produced there. c)mRNA are produced there. | Proteins are produced there. |
| Each tRNA anticodon has three bases. The three base combinations are codes for attracting specific kinds of: a)endoplasmic reticula b)ribosomes c)amino acids. | amino acids |
| Which of the following statements is true about DNA replication? a)One DNA molecule becomes two identical ones as a result of this process. b)It occurs during meiosis but not mitosis. c)It is part of the protein synthesis process. | A |
| A DNA codon consists of: | three nucleotides |
| A gene is essentially a: | sequence of many codons in a DNA molecule |
| There are about 3 billion chemical base pairs in human DNA. Approximately what percent of these base pairs actually code for genes? | 1-2% |
| Portions of DNA molecules that do not contain the codes for proteins are called: | introns |
| Which is true about DNA code? a)Each of the 64 types of codons in DNA and RNA code for a different amino acid b)Not all codons specify amino acid components to be included in a protein. c)DNA rep. has a built in mechanism that stops or corrects erro | B |
| The DNA code is: | shared by all living things |
| The monomers that nucleic acids are built from are _____ and they contain not only atoms of C, H, O, and N but also ____. | nucleotides; phosphorus |
| Wave lengths in the electromagnetic spectrum that are mutagenic are absorbed by | DNA |
| Which of the following DNA base sequences is complementary to this base sequence: ACGGATTAG | TGCCTAATC |
| The production of a protein from mRNA is called ______. | translation |
Created by:
cpemberton96
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