Nurse Cheung TEAS 7 - Most Common Biology Questions (2026)

Which of the following is responsible for carrying amino acids to ribosomes during protein synthesis?

tRNA

What is the primary role of the sodium-potassium pump in animal cells?

To maintain the cell's osmotic balance

What is the difference between a monosaccharide and a polysaccharide?

Disaccharides are composed of two simple sugars, while monosaccharides are simple sugars that cannot be broken down into simpler sugars

Which of the following statements best describes the process of meiosis?

It is responsible for reducing the chromosome number in gametes

What is the name of the genetic disorder caused by the presence of an extra chromosome?

Down syndrome

Which of the following describes an individual with genotype AaBb, where A and a represent the alleles for one gene and B and b represent the alleles for another gene?

Heterozygous for both traits

Which of the following microorganisms lack their own metabolic pathways and can only reproduce inside of a host cell?

Virus

Which of the following best represents Mendel's Law of Independent Assortment?

The inheritance of one gene does not affect the inheritance of another gene located on another chromosome

Which of the following is used to determine a person's DNA sequence?

Genes

The cytoskeleton of a cell is comprised of which of the following macromolecules?

Proteins

What is the phenotypic ratio of offspring in a monohybrid cross between two heterozygous individuals (Aa x Aa) for a single gene with complete dominance?

3:1

Which of the following genotypes represents an individual who is homozygous for a recessive trait?

aa

A patient goes to the doctor with a sore throat and a cold. They ask for antibiotics, and the doctor refuses to prescribe them. What kind of microorganism is causing the illness?

A virus

Genetic information that describes characteristics of an organism is found in which of the following?

Nuclei