Question

1. errors in dna replication can contribute to the development of

a. improved genetic integrity
b. healthy cellular function
c. enhanced dna repair
d. genetic disorders and diseases

1. which syndrome is caused by a deletion in a small segment of chromosome 22?

a. cystic fibrosis
b. down syndrome
c. digeorge syndrome
d. huntingtons disease

1. what is the role of ligase in dna replication?

a. adds nucleotides to the growing strand
b. unwinds the double helix
c. seals gaps between okazaki fragments
d. initiates replication

1. what is the function of rna polymerase during transcription?

a. synthesizes dna from an mrna template
b. forms peptide bonds during translation
c. synthesizes mrna from a dna template
d. translates mrna into proteins

1. which nucleotide base pairs with adenine in mrna during transcription?

a. cytosine
b. uracil
c. guanine
d. thymine

1. where does transcription occur in eukaryotic cells?

a. in the cytoplasm
b. in the nucleus
c. in the ribosomes
d. in the mitochondria

1. which term refers to alterations or changes occurring in the sequence of nucleotides that make up an organisms dna?

a. genetic variation
b. genetic selection
c. genetic mutations
d. genetic drift

Explanation:

• Question 8: Errors in DNA replication can lead to incorrect genetic information, which may cause genetic disorders and diseases. For example, if a wrong nucleotide is inserted during replication, it can disrupt the normal function of a gene.
• Question 9: DiGeorge syndrome is caused by a deletion in a small segment of chromosome 22. This deletion affects the development of several body systems.
• Question 10: Primase (if that's what "ligase" was a typo for, but assuming correct term) initiates DNA replication by synthesizing short RNA primers.
• Question 11: RNA polymerase synthesizes mRNA from a DNA template during transcription.
• Question 12: In RNA (mRNA), adenine pairs with uracil.
• Question 13: Transcription occurs in the nucleus in eukaryotic cells as that's where the DNA is located.
• Question 14: Genetic mutations refer to alterations or changes in the sequence of nucleotides that make up an organism's DNA.

Answer:

• 8. d. Genetic disorders and diseases
• 9. c. DiGeorge syndrome
• 10. d. Initiates replication (assuming correct role for the enzyme in question, if it was primase)
• 11. c. Synthesizes mRNA from a DNA template
• 12. b. Uracil
• 13. b. In the nucleus
• 14. c. Genetic mutations