Which of the following best describes the DNA in prokaryotic cells?
3.4.1 DNA, genes and chromosomes

Quiz
•
Biology
•
11th Grade
•
Easy

Ross Kearns
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Long, linear and associated with histones
Short, circular and not associated with proteins
Short, linear and associated with proteins
Long, circular and associated with histones
Answer explanation
The DNA in prokaryotic cells is typically short and circular, existing as a single chromosome. Unlike eukaryotic DNA, it is not associated with histones, making 'Short, circular and not associated with proteins' the correct description.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In eukaryotic cell nuclei, DNA molecules are:
Short, circular and not associated with proteins
Very long, linear and associated with histones
Short, linear and associated with proteins
Very long, circular and not associated with proteins
Answer explanation
In eukaryotic cell nuclei, DNA is very long and linear, and it is associated with histones, which help package the DNA into a compact structure. This distinguishes it from prokaryotic DNA, which is typically circular.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the name given to the proteins that DNA is associated with in eukaryotic chromosomes?
Enzymes
Histones
Ribosomes
Ligases
Answer explanation
In eukaryotic chromosomes, DNA is wrapped around proteins called histones. These proteins help in packaging DNA into a compact structure, allowing for efficient storage and regulation of genetic information.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which organelles in eukaryotic cells contain DNA similar to that of prokaryotes?
Ribosomes and lysosomes
Mitochondria and chloroplasts
Nucleus and endoplasmic reticulum
Golgi apparatus and peroxisomes
Answer explanation
Mitochondria and chloroplasts contain their own DNA, which is similar to prokaryotic DNA. This is due to their evolutionary origin from free-living bacteria, unlike other organelles that do not have their own DNA.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A gene is best defined as:
A protein that codes for DNA
A base sequence of DNA that codes for a polypeptide or functional RNA
A sequence of amino acids
A type of histone
Answer explanation
A gene is defined as a base sequence of DNA that codes for a polypeptide or functional RNA, making the second choice correct. It is not a protein, amino acid sequence, or histone.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the fixed position that a gene occupies on a DNA molecule called?
Codon
Locus
Exon
Intron
Answer explanation
The fixed position that a gene occupies on a DNA molecule is called a locus. This term refers to the specific location of a gene on a chromosome, distinguishing it from terms like codon, exon, and intron, which refer to different aspects of gene structure.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A sequence of three DNA bases that codes for a specific amino acid is called a:
Codon
Triplet
Exon
Locus
Answer explanation
A sequence of three DNA bases that codes for a specific amino acid is called a triplet. While 'codon' is also used, 'triplet' specifically refers to the three-base sequence, making it the correct choice.
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