27 Questions
Which nucleotide is complementary to adenine in a DNA molecule?
Thymine
What is the structure formed by two DNA strands coiled around each other?
Double helix
What are the basic units of DNA?
Nucleotides
In DNA, which nucleotide base is complementary to guanine?
Thymine
What is the base sequence representation for RNA containing the sequence: adenine, uracil, cytosine, guanine?
AUGC
Which molecule determines the genetic information carried by a cell?
Base sequence in DNA or RNA
Which nucleotide base is found in RNA but not in DNA?
Uracil
What type of sugar is found in DNA?
Deoxyribose
What is the structure of RNA?
Single-stranded molecule
Where are chromosomes located in eukaryotic cells?
Nucleus
What is the primary composition of chromosomes?
DNA and proteins
How many chromosomes do humans typically have?
46
Where are chromosomes located in eukaryotic cells?
Nucleus
What is the primary composition of chromosomes?
DNA and proteins
How many chromosomes do humans typically have?
46
What is the function of a codon in DNA or RNA?
Coding for a specific amino acid or stop signal during protein synthesis
How many nucleotides make up a codon in DNA or RNA?
Three
What does a codon correspond to during protein synthesis?
A specific amino acid or stop signal
What is the primary composition of a nucleotide in DNA?
Deoxyribose, phosphate group, nitrogenous base
What holds the two strands of DNA together in the double helix structure?
Hydrogen bonds between nitrogenous bases
What forms the backbone of each strand in the DNA double helix?
Sugar and phosphate groups
In DNA, what is attached to the 5' carbon of the deoxyribose sugar at the 5' end?
Phosphate group
Why is the directionality of DNA molecule important for DNA replication and transcription?
These processes occur in a specific direction (from 5' to 3')
What is attached to the 3' carbon of the deoxyribose sugar at the 3' end of the DNA molecule?
Hydroxyl group
What is the enzyme responsible for carrying out the transcription process?
RNA polymerase
During which stage of transcription does the RNA polymerase bind to a specific region of the DNA called the promoter?
Initiation
What is the function of the terminator in the transcription process?
Stops the addition of nucleotides by RNA polymerase
Test your knowledge of DNA structure and function with this quiz! Explore the basics of nucleotides, double helix formation, and the genetic instructions carried by DNA. Sharpen your understanding of this fundamental molecule for all living organisms.
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