are my answers correct and I need help with the black ones BIO-2500 Test 2 (Due
ID: 152066 • Letter: A
Question
are my answers correct and I need help with the black ones
BIO-2500 Test 2 (Due 10/2/18 at 12:30 PM) Name All 9/27/18 questions are worth 3 pts each unless noted. 1. A point mutation that results in no change to the amino acid sequence is called a mutation. 2. A point mutation that results in a change to the amino acid sequence is called a 3. A point mutation that results in a premature stop codon is called a nonense mutation. 4. An organism's entire chromosomal (genetic) content is referred to as its E0omE 5. What affect does exposure to UV light have on bacterial cells?Auses cosalers be 6. RNA polymerases bind to regions of DNA called iontrns mine baSES type of RNA brings amino acids to the ribosome during protein synthesisNb of the ribosome, while the second 8. During protein synthesis, the first tRNA enters the site of the ribosome. tRNA acid enters the 9. T/F. A single gene can be used to make numerous mRNA transcripts 10. Consider the following codon: CUA. What will the anticodon sequence be? CuG LEuCinE 11. Why is it important for transformed DNA fragments to become integrated into the recipient cell's genome? is the process by which DNA is transferred from a donor bacterium to a 12. Tans recipient bacterium via a bacteriophage. is the process of genetic transfer that requires contact between donor and 13. cells. ion is the process by which DNA is taken in by a bacterium from its 14. mulatsA terne-Explanation / Answer
Answer
9. True
Explanation : such genes are called polycistronic genes
10. Codon Is CUA. Which is present on mRNA
It's anticodon will be complementary to it. GAU on tRNA
16) structure of DNA:
- it was described by watson and crick
Features
1) DNA is double helical structure coiled around a central imaginary axis.
Two strands are present which are antiparallel to each other.
2) each singl strand is the polymer of nucleotides which are basic unit of DNA.
Nucleotide = deoxribose sugar + nitrogen bases + phosphate
4 types of nucleotide based on 4 types of nitrogen bases
The two successive nucleotide of same strand are bonded by phosphodiester bond.
The two nucleotide of opposite strands are held togather by hydrogen bonds between nitrogen bases.
Nitrogen base of one strand forms bond with nitrogen base of opposite strand. This binding is very specific.
Adenine of one strand will form bond with thyamine of opposite starnd and guanine of on strand joins with cytosine of opposite strand. This is called complementary bonding. As a result, total adenine + guanine = cytosine + thyamine
This is called chargaffs rule.
The two strands have oppsite polarity. One runs in 5' and other in 3' based on presence of free PO4 at 5 carbon and free OH group at 3 carbon respectively
17) scientists deliberately cause mutation in the genes in order to study the function of the genes properly and to observe the effect of mutation and derangement of nucleotide sequencing on the gene
All others are correct
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