1Formulas and methods
Biology for nursing entrance exams
Method
- Name the topic of the question: cell parts, transport, division, DNA and protein synthesis, inheritance, biomolecules, microorganisms or experimental design.
- Recall the key rule: A–T and G–C, diffusion from high to low, water moves towards more solute, mitosis keeps and meiosis halves the chromosome number.
- For crosses, write the parents’ genotypes, list the gametes and fill a Punnett square before counting.
- For experiments, label the independent, dependent and controlled variables, and ask whether the evidence supports or only suggests the conclusion.
- Check each option against the question asked, not just whether it is a true statement.
Chemistry for nursing entrance exams
Method
- Identify what is given and asked: particles, a formula, a state change, a concentration, a pH or a mass.
- Use the periodic table: the atomic number gives protons, the group gives valence electrons and the usual ion charge.
- Balance equations with coefficients only, element by element, oxygen and hydrogen last.
- For amounts, go mass → moles → mole ratio → moles → mass, and for solutions use M = mol/L and C₁V₁ = C₂V₂.
- Remember that pH is logarithmic: one unit is a factor of 10.
2Practice problems
1.Human anatomyMedium
The circle of Willis at the base of the brain connects which two arterial supplies?
- AInternal carotid and vertebrobasilar systems
- BExternal carotid and subclavian arterial systems
- CJugular and vertebral systems
- DLeft and right external carotid arteries
2.Human anatomyHard
Which muscle is the main flexor of the hip joint?
- AIliopsoas
- BBiceps femoris
- CAdductor magnus
- DGluteus maximus
3.Human physiologyMedium
Why do myelinated axons conduct action potentials faster than unmyelinated ones?
- AMyelin makes the axon thinner
- BMyelin contains more sodium channels
- CMyelin releases neurotransmitter along the axon
- DThe impulse jumps between nodes of Ranvier
4.Human physiologyHard
A patient with diabetic ketoacidosis breathes deeply and rapidly. What pattern is expected on the blood gas?
- ALow pH, low bicarbonate and low PaCO₂
- BLow pH, normal bicarbonate and high PaCO₂
- CLow pH, high bicarbonate and high PaCO₂
- DHigh pH, low bicarbonate and low PaCO₂
5.Biology for nursing entrance examsMedium
Which statement best describes biological evolution?
- AMovement of animals to a new habitat each year
- BChange in the inherited traits of a population over generations
- CGrowth of an organism from a single zygote to a fully grown adult
- DChange in the body of one organism during its lifetime
6.Biology for nursing entrance examsHard
Which statement correctly compares mitosis and meiosis?
- ABoth give gametes with half the chromosome number of the parent cell, for reproduction
- BMitosis has two divisions and gives four identical cells
- CMeiosis has two divisions and gives four genetically different haploid cells
- DMeiosis gives two cells identical to the parent
7.Chemistry for nursing entrance examsMedium
How does a mixture of iron filings and sulfur powder differ from the compound iron sulfide?
- AThe mixture is formed by a chemical reaction between the two elements
- BThe compound keeps the magnetic properties of iron
- CThe mixture can be separated physically, for example with a magnet
- DThe mixture has a fixed ratio of iron to sulfur
8.Chemistry for nursing entrance examsHard
A liquid has a density of 1.2 g/mL. What is the mass of 250 mL of this liquid?
- A208 g
- B30 g
- C300 g
- D251.2 g
3Solutions
1.Human anatomy
Answer: A · Internal carotid and vertebrobasilar systems
Why this is the answer
The circle of Willis links the internal carotid arteries with the basilar artery (formed by the vertebral arteries), allowing some collateral flow.
A · Internal carotid and vertebrobasilar systems
2.Human anatomy
Answer: A · Iliopsoas
Why this is the answer
Iliopsoas (psoas major and iliacus) is the strongest hip flexor. Gluteus maximus extends the hip.
3.Human physiology
Answer: D · The impulse jumps between nodes of Ranvier
Why this is the answer
Myelin insulates the axon, so action potentials are only generated at the nodes of Ranvier. This saltatory conduction is much faster.
D · The impulse jumps between nodes of Ranvier
4.Human physiology
Answer: A · Low pH, low bicarbonate and low PaCO₂
Why this is the answer
Ketoacids consume bicarbonate, causing metabolic acidosis. Kussmaul breathing lowers PaCO₂ as respiratory compensation.
A · Low pH, low bicarbonate and low PaCO₂
5.Biology for nursing entrance exams
Answer: B · Change in the inherited traits of a population over generations
Why this is the answer
Evolution is a change in the frequency of inherited traits in a population over many generations. Growth, development and seasonal migration are changes within a lifetime and are not evolution.
B · Change in the inherited traits of a population over generations
6.Biology for nursing entrance exams
Answer: C · Meiosis has two divisions and gives four genetically different haploid cells
Why this is the answer
Mitosis: one division, two identical diploid cells. Meiosis: two divisions, four haploid cells made different by crossing over and independent assortment.
C · Meiosis has two divisions and gives four genetically different haploid cells
7.Chemistry for nursing entrance exams
Answer: C · The mixture can be separated physically, for example with a magnet
Why this is the answer
In a mixture the components are not chemically bonded, keep their properties and can be present in any ratio, so a magnet pulls out the iron. In iron sulfide the elements are bonded in a fixed ratio with new properties.
C · The mixture can be separated physically, for example with a magnet
8.Chemistry for nursing entrance exams
Answer: C · 300 g
Why this is the answer
1.2 g/mL × 250 mL = 300 g. Dividing 250 by 1.2 gives about 208, which has the wrong units (mL²/g).
This is independent practice material. ExamProblems is not affiliated with or endorsed by the organisation that runs this exam, and the exam name is used only to describe the content. ATI TEAS is a trademark of Assessment Technologies Institute, LLC (ATI), which is not affiliated with ExamProblems and does not endorse it or vouch for its accuracy.