Genetics and Molecular Biology Quiz for 10th Grade

What is an allele?

• A type of protein

• A variant of a gene

• A cellular organelle

• A type of RNA molecule

Which of the following best describes amino acids?

• They are the building blocks of DNA

• They are types of nucleotides

• They are molecules that combine to form proteins

• They are enzymes involved in DNA replication

In DNA, which base pairs with thymine?

• Guanine

• Cytosine

• Uracil

• Adenine

What is the primary function of helicase during DNA replication?

• To join DNA fragments together

• To add nucleotides to the growing DNA strand

• To separate double-stranded DNA into single strands

• To proofread the newly synthesized DNA

Which term describes the genetic makeup of an organism?

• Phenotype

• Pedigree

• Inheritance

• Genotype

What is meiosis?

• The process of protein synthesis

• A type of cell division that produces gametes

• The replication of DNA

• The observable expression of genes

Which of the following is NOT a characteristic of RNA?

• It is usually single-stranded

• It contains the base uracil

• It is composed of nucleotides

• It always forms a double helix structure

What is the main function of ribosomes in a cell?

• To store genetic information

• To produce energy for the cell

• To synthesize proteins

What is gene expression?

• The visible traits of an organism

• The process of making proteins from DNA code

• The exchange of genetic material between chromosomes

Which term describes having two different versions of the same gene?

• Homozygous

• Phenotype

• Heterozygous