Genetics test 2025

The average number of chromosomes found in a human body cell is?

• 46 chromosomes

• 23 chromosomes

• 12 Chromosomes

• None of the above

A strand of DNA has the base sequence CCTAGTC. What is the complementary sequence?

• GGCATCC

• GGATCAG

• GTATACT

• GATCATA

Which of the following statements best describes a structural difference between DNA and RNA?

• DNA is found only in the nucleus, while RNA is found only in the cytoplasm.

• DNA contains the sugar ribose, while RNA contains the sugar deoxyribose.

• DNA has a double-helix structure, while RNA is usually single-stranded.

• DNA bases include uracil, while RNA bases include thymine.

What is the role of ribosomes in translation?

• Transcribing DNA into mRNA

• Carrying amino acids to the ribosome

• Creating a protein by joining amino acids

• Packaging and modifying proteins

Which of the following is not a characteristic of RNA?

• Ribose sugar

• Single stranded

• Uracil

• Deoxyribose sugar

The job of mRNA can best be described as?

What is the function of the molecule described as tRNA?

• Collects amino acids and attaches them in a chain

• Forms part of the ribosome

• Is part of the DNA

Which of the following is the correct order of mitosis?

• Prophase, anaphase, interphase, telophase

• Anaphase, metaphase, telophase, prophase

• Prophase, metaphase, anaphase, telophase

• Interphase, metaphase, anaphase, telophase

What stage of mitosis is shown?

• prophase

• telophase

• anaphase

• metaphase

During transcription, the DNA strand that serves as a template for mRNA synthesis is called the:

• coding strand

• non-template strand

• promoter strand

• template strand