Question

question 5
dna sequencing resembles the natural process of
a. dna replication.
b. protein synthesis.
c. dna repair.
d. alternative splicing.
question 6
which statement comparing eukaryotic genomes with prokaryotic genomes is false?
a. the percentage of the eukaryotic genome devoted to coding sequence is higher.
b. eukaryotic genomes tend to have more regulatory sequences.
c. eukaryotic genomes usually have more repetitive dna.
d. eukaryotic genomes tend to be larger.
question 7
which process or element is required for the formation of gene families?
a. highly repetitive dna.
b. gene duplication
c. gene inactivation
d. pseudogenes
question 8
which statement about the globin genes in humans is false?
a. some different genes carry out different functions.
b. all arose from a single common ancestor gene.
c. they are an example of a gene family.
d. all are expressed at the same time.

Explanation:

• Question 5: DNA sequencing uses DNA polymerase (similar to DNA replication) to synthesize new DNA strands. Protein synthesis involves ribosomes and RNA. DNA repair fixes damaged DNA. Alternative splicing is for mRNA processing.
• Question 6: Prokaryotic genomes have a higher percentage of coding sequence. Eukaryotic genomes have more regulatory sequences, repetitive DNA, and are larger.
• Question 7: Gene duplication is the key for gene family formation. Repetitive DNA is not the cause. Gene inactivation and pseudogenes are not the required process.
• Question 8: Globin genes (like in hemoglobin development) are a gene family from a common ancestor. Different genes (e.g., fetal vs. adult globin) have different functions. They are not all expressed simultaneously.

Answer:

• Question 5: A. DNA replication
• Question 6: A. The percentage of the eukaryotic genome devoted to coding sequence is higher
• Question 7: B. Gene duplication
• Question 8: D. All are expressed at the same time