Biology
Explore the World of Genetics
Test your knowledge of biology with this engaging quiz that covers essential concepts in genetics, molecular biology, and heredity. Challenge yourself and see how well you understand the mechanisms of life!
- 11 multiple choice questions
- Covers topics like DNA structure, genetic traits, and enzyme fun
ctions - Perfect for students, educators, and biology enthusiasts
The backbone of DNA consists of?
Nitrogenous base
A repeating sugar-phosphate-sugar-phosphate pattern
A repeating sugar-nucleotide-sugar-nucleotide pattern
Paired nucleotides
After replication, ________.
Each new DNA double helix consists of two old strands
Each new DNA double helix consists of one old strand and one new strand
Each new DNA double helix consists of two new strands
One new DNA double helix consists of two old strands and the other new DNA double helix consists of two new strands
The expressed (coding) regions of eukaryotic genes are called ________.
Exons
Introns
Promoters
Caps
The CORRECT sequence of events occurring during transcription is ________.
Tailing, capping, splicing
Elongation, initiation, termination
Splicing, capping, tailing
Initiation, elongation, termination
During translation, what is the CORRECT order of events that occur as an amino acid is added?
Peptide bond formation, translocation, codon recognition
Translocation, codon recognition, termination
Codon recognition, peptide bond formation, translocation
Initiation, codon recognition, termination
HIV (human immunodeficiency virus) must use its own ________ to reproduce.
RNA polymerase
TRNA
Reverse transcriptase
DNA polymerase
A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The seeds of all of the offspring are yellow. Why?
The yellow allele is dominant to the green allele.
The alleles are codominant.
All of the offspring are homozygous yellow.
The yellow allele is recessive to the green allele.
Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes?
2:1
1:2
3:1
1:1
An individual with the genotype AaBb produces four different gametes in equal proportions. This is a demonstration of ________.
Linkage
Mendel's principle of segregation
The chromosomal theory of inheritance
Mendel's law of independent assortment
What is the key to the recognition of codominance?
The phenotype of the heterozygote is intermediate between the phenotypes of the homozygotes.
The heterozygote expresses the phenotype of both homozygotes
The alleles affect more than one trait.
The trait exhibits a continuous distribution
An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. If an individual with wavy hair mates with an individual with straight hair, what is the probability that their child will have curly hair?
0%
25%
50%
100%
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