The last of 24 human chromosomes to be sequenced was:
1. Chromosome 1 and completed in 2003
2. Chromosome 1 and completed in 2006
3. Chromosome X and completed in 2003
4. Chromosome X and completed in 2006
Satellite DNA:
1. Form a small portion of the human genome
2. Code for proteins that are essential for survival
3. Code for proteins that are not essential for survival
4. Show a high degree of polymorphism
Southern blotting is transfer to nitrocellulose sheet from agar gel of:
1. | RNA | 2. | Proteins |
3. | DNA | 4. | Lipids |
In eukaryotes, RNA polymerase III transcribes:
1. | hnRNA, snRNAs and 5.8S RNA |
2. | tRNA, 5.8S RNA and snRNAs |
3. | tRNA, 5SrRNA and snRNAs |
4. | rRNAs – 28S, 18S and 5S |
Identify the incorrect statement:
1. | The DNA of the bacteriophage ϕ X 174 has 5386 nucleotides. |
2. | Bacteriophage lambda DNA has 48502 base pairs. |
3. | The DNA of Escherichia coli has 4.6 X 103 base pairs. |
4. | Haploid content of human DNA is 3.3 X 109 base pairs. |
Which of the following is likely if there is a mutation in the lacY gene of the lac operon in E.coli?
1. | The lac genes would be expressed efficiently only in the absence of lactose. |
2. | The lac genes would be expressed efficiently until the lactose supply in the cell is exhausted. |
3. | The lac genes would be expressed continuously. |
4. | Expression of the lac genes would cease immediately. |
Avery, MacLeod, and McCarty used DNase in their experiment because:
1. | It enabled them to isolate pure DNA samples. |
2. | It enabled them to isolate pure protein samples. |
3. | This allowed them to demonstrate that removing the DNA prevents transformation. |
4. | It made sure that RNA will always be present when they attempted to transform the R strain. |
Identifying all the genes in the genome that are transcribed into RNA is called:
1. | Expressed Sequence Tag | 2. | Sequence Annotation |
3. | Inverse PCR | 4. | Retrotransposition |
In RNA splicing:
1. | Exons are removed and introns are joined together |
2. | Introns are removed and exons are joined together |
3. | Cistrons are removed and introns are joined together |
4. | Introns are removed and Cistrons are joined together |
Which of the following is not a feature of the double helix model of DNA?
1. | The two chains have anti-parallel polarity |
2. | A purine always comes opposite to a pyrimidine |
3. | The pitch of the DNA is 3.4 nm |
4. | The two chains are coiled in a left handed fashion |