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
Which valve lies between the left atrium and the left ventricle?
- ATricuspid valve
- BMitral (bicuspid) valve
- CPulmonary valve
- DAortic valve
2.Human anatomyHard
Which structure passes through the inguinal canal in males?
- AFemoral artery
- BSpermatic cord
- CGreat saphenous vein
- DObturator nerve
3.Human physiologyMedium
Which ion enters the cell to cause the depolarisation phase of a typical neuronal action potential?
- ASodium (Na⁺)
- BCalcium (Ca²⁺)
- CChloride (Cl⁻)
- DPotassium (K⁺)
4.Human physiologyHard
In a patient with primary hypothyroidism, you would expect:
- AHigh TSH and low free T4
- BLow TSH and low free T4
- CHigh TSH and high free T4
- DLow TSH and high free T4
5.Biology for nursing entrance examsMedium
How does facilitated diffusion differ from simple diffusion?
- AIt only moves gases such as oxygen
- BIt uses ATP to move molecules uphill
- CIt uses channel or carrier proteins but no ATP
- DIt moves molecules against their gradient using a pump and ATP
6.Biology for nursing entrance examsHard
The coding part of an mRNA is 900 bases long, including the start codon and the stop codon. How many amino acids are in the protein?
- A298
- B300
- C299
- D900
7.Chemistry for nursing entrance examsMedium
Which measurement has three significant figures?
- A5.0006
- B0.0056
- C56
- D0.00560
8.Chemistry for nursing entrance examsHard
A compound is a gas at room temperature, does not conduct electricity in any state, and is made of two nonmetals. What kind of substance is it most likely?
- AA simple molecular (covalent) substance
- BA metal with delocalised electrons
- CAn ionic compound (a lattice of ions)
- DA giant covalent network solid
3Solutions
1.Human anatomy
Answer: B · Mitral (bicuspid) valve
Why this is the answer
The mitral (bicuspid) valve separates the left atrium and left ventricle; the tricuspid valve does the same on the right side.
B · Mitral (bicuspid) valve
2.Human anatomy
Answer: B · Spermatic cord
Why this is the answer
The inguinal canal carries the spermatic cord in males and the round ligament in females. The femoral vessels pass below the inguinal ligament instead.
3.Human physiology
Answer: A · Sodium (Na⁺)
Why this is the answer
Voltage-gated Na⁺ channels open and Na⁺ rushes in, depolarising the membrane. K⁺ outflow then repolarises it.
4.Human physiology
Answer: A · High TSH and low free T4
Why this is the answer
When the thyroid fails, low T4 removes negative feedback and the pituitary raises TSH. Low TSH with low T4 would point to secondary (pituitary) hypothyroidism.
A · High TSH and low free T4
5.Biology for nursing entrance exams
Answer: C · It uses channel or carrier proteins but no ATP
Why this is the answer
In facilitated diffusion, molecules that cannot cross the lipid bilayer pass through membrane proteins, still down their gradient and without ATP.
C · It uses channel or carrier proteins but no ATP
6.Biology for nursing entrance exams
Answer: C · 299
Why this is the answer
900 ÷ 3 = 300 codons. The start codon (AUG) codes for methionine, but the stop codon codes for no amino acid, so the protein has 299 amino acids.
7.Chemistry for nursing entrance exams
Answer: D · 0.00560
Why this is the answer
In 0.00560 the leading zeros are placeholders, while 5, 6 and the final 0 are significant. 0.0056 and 56 have two significant figures and 5.0006 has five.
8.Chemistry for nursing entrance exams
Answer: A · A simple molecular (covalent) substance
Why this is the answer
Nonmetals bond covalently, and a gas at room temperature must have weak forces between separate molecules. No ions or free electrons means no conduction. Giant networks such as diamond are solids with very high melting points.
A · A simple molecular (covalent) substance
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.