Question

In: Biology

U Use the key below to answer questions A. something RNA would say C. something DNA...

U

Use the key below to answer questions

A. something RNA would say C. something DNA and RNA would say

B. something DNA would say D. something neither DNA nor RNA would say

21. “Being a double-stranded molecule sure keeps me from moving around the cell”

22. “Ah, replication is finished. What’s up my brother?”

23. “ Roll call: Adenine” “ Here” “Guanine” “ Here” “Cytosine” “ Here” “Uracil” “ Here”

24. “ I feel so small; only three nucleotides long.”

25. Which of the following is the correct sequence of events in the formation of a protein?

DNA---mRNA---mRNA processing---mRNA leaves the nucleus---mRNA binds to ribosome in cytoplasm---tRNA's bring amino acids to the mRNA at the ribosome---amino acids link together with peptide bonds---polypeptide is released into the cytoplasm

amino acids link together with peptide bonds ---polypeptide is released into the cytoplasm---DNA---mRNA---mRNA binds to ribosomes in the cytoplasm---tRNA's bring amino acids to the mRNA at the ribosomes

tRNAs bring amino acids to the mRNA at the ribosomes---amino acids link together with peptide bonds---polypeptide is released into the cytoplasm---DNA---mRNA---mRNA binds to ribosomes in cytoplasm

DNA---mRNA processing---mRNA produced---mRNA leaves the nucleus---tRNAs bring amino acids to the mRNA at the ribosomes---mRNA binds to ribosomes in cytoplasm---amino acids link together with peptide bonds---polypeptide is released into the cytoplasm

. A murder has occurred, and you are asked to help solve it. The police bring you a sample from

the crime scene of what they believe is the killer’s DNA and ask you for a chemical analysis. Your

study of this sample reveals the presence of adenine, thymine, ribose and uracil, leading you to

conclude that the sample is

pure DNA
pure RNA
probably a mixture of DNA and RNA
probably a mixture of rRNA and mRNA

. Refer to the mRNA codon chart . If the DNA sequence is GGC, the resulting amino acid that is coded for is

A. glycine B. praline C. arginine D. asparagines E. tryptophan

A foreign piece of DNA, read left to right, that could be inserted in this gap is

TTAA B. AAUU C. TTGC D. AATT

Which of the following choices below represents an example of geographic isolation?

A. two populations live in a valley between two mountains

B. two populations live on different mountains with a valley between them

C. two populations live along the same side of a river

D. two populations live in overlapping habitats

Which of the following bird species are most closely related?

A. Picoides borealis and Phylloscopus borealis

B. Numenius borealis and Picoides borealis sapiens

C. Numenius americanus and Grus Americana

D. Picoides villosus and Picoides borealis

Expert Solution

21. Something DNA and RNA would say. As RNA also at times exists in double stranded form.

22. Something DNA would say.

23.Something RNa would say.

24. Something neither DNA not RNA would say.

25. The correct sequence is DNA- mRNA- mRNA processing- leaves nucleus- binds to ribosomes- tRNA brings amino acids- aminoacids linked- polypeptide formed.

26. It could be a mixture of DNA and RNA as thymine is present in DNA but not RNAand ribose and uracil are present in RNA but not in DNA.

27. If the DNA sequence is GGC the mRNA codon will be complementary, CCG that codes for proline.

28.The sequence in which the Gap is present is not mentioned in the question. It is definitely not B as it has uracil which is not a. part of DNA

29. B.Two populatioñ on two mountains with a valley in between them represents geographical isolation.

30. D. Picoides villosus and Picoides borealis are closely related as they belong to the same genus.

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