TEAS-style science practice: cram pack

Formula sheets, the key method steps for every topic and 8 practice problems, with full solutions at the back.

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1Formulas and methods

Biology for nursing entrance exams

Method

  1. Name the topic of the question: cell parts, transport, division, DNA and protein synthesis, inheritance, biomolecules, microorganisms or experimental design.
  2. 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.
  3. For crosses, write the parents’ genotypes, list the gametes and fill a Punnett square before counting.
  4. For experiments, label the independent, dependent and controlled variables, and ask whether the evidence supports or only suggests the conclusion.
  5. Check each option against the question asked, not just whether it is a true statement.

Chemistry for nursing entrance exams

Method

  1. Identify what is given and asked: particles, a formula, a state change, a concentration, a pH or a mass.
  2. Use the periodic table: the atomic number gives protons, the group gives valence electrons and the usual ion charge.
  3. Balance equations with coefficients only, element by element, oxygen and hydrogen last.
  4. For amounts, go mass → moles → mole ratio → moles → mass, and for solutions use M = mol/L and C₁V₁ = C₂V₂.
  5. Remember that pH is logarithmic: one unit is a factor of 10.

2Practice problems

1.Human anatomyMedium

In which structure do sperm mature and get stored after leaving the testis?

  1. ASeminal vesicle
  2. BSeminiferous tubules
  3. CProstate gland
  4. DEpididymis
2.Human anatomyHard

An indirect inguinal hernia enters the inguinal canal at which point?

  1. AThrough the posterior wall of the canal, medial to the inferior epigastric vessels
  2. BBelow the inguinal ligament, through the femoral canal
  3. CThrough the superficial ring only, without entering the canal
  4. DThrough the deep inguinal ring, lateral to the inferior epigastric vessels
3.Human physiologyMedium

Why is the oxygen–haemoglobin dissociation curve S-shaped?

  1. AOxygen dissolves better in plasma at high partial pressure
  2. BBinding of one oxygen makes the next bind more easily
  3. CRed cells change size as they take up oxygen
  4. DHaemoglobin can bind only one oxygen molecule
4.Human physiologyHard

Which transporter in the thick ascending limb of the loop of Henle is key to building the medullary concentration gradient?

  1. AThe epithelial sodium channel (ENaC)
  2. BThe Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)
  3. CAquaporin-2 water channels
  4. DThe sodium–glucose cotransporter (SGLT2)
5.Biology for nursing entrance examsMedium

What happens to an enzyme after it has catalysed a reaction?

  1. AIt becomes part of the product and leaves with it
  2. BIt changes into the substrate
  3. CIt is released unchanged and can be used again
  4. DIt is broken down into amino acids
6.Biology for nursing entrance examsHard

Which parent's gamete decides the biological sex of a human baby, and why?

  1. ABoth equally, because each gives one Y chromosome
  2. BThe mother's, because she gives two X chromosomes
  3. CThe father's, because a sperm carries either an X or a Y
  4. DThe mother's, because an egg carries either an X or a Y
7.Chemistry for nursing entrance examsMedium

What is nuclear fission?

  1. AThe joining of two light nuclei to form a heavier nucleus
  2. BThe loss of electrons from an atom
  3. CThe burning of uranium in oxygen
  4. DThe splitting of a heavy nucleus into smaller nuclei
8.Chemistry for nursing entrance examsHard

What is the formula of iron(III) chloride?

  1. AFeCl₃
  2. BFe₂Cl₃
  3. CFeCl₂
  4. DFe₃Cl

3Solutions

1.Human anatomy

Answer: D · Epididymis

Why this is the answer

Sperm are made in the seminiferous tubules and then mature and are stored in the epididymis before passing into the ductus deferens.

Answer

D · Epididymis
2.Human anatomy

Answer: D · Through the deep inguinal ring, lateral to the inferior epigastric vessels

Why this is the answer

An indirect hernia passes through the deep ring, lateral to the inferior epigastric vessels, and runs along the canal. A direct hernia pushes through the posterior wall medial to them.

Answer

D · Through the deep inguinal ring, lateral to the inferior epigastric vessels
3.Human physiology

Answer: B · Binding of one oxygen makes the next bind more easily

Why this is the answer

Haemoglobin shows cooperative binding: each bound O₂ increases the affinity of the remaining sites, giving a sigmoid curve.

Answer

B · Binding of one oxygen makes the next bind more easily
4.Human physiology

Answer: B · The Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)

Why this is the answer

NKCC2 moves Na⁺, K⁺ and Cl⁻ out of the tubule into the interstitium without water, building the medullary gradient. Loop diuretics such as furosemide block it.

Answer

B · The Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)
5.Biology for nursing entrance exams

Answer: C · It is released unchanged and can be used again

Why this is the answer

Enzymes are catalysts. The product leaves the active site, and the enzyme is free to bind another substrate molecule, so a small amount of enzyme can act on many molecules.

Answer

C · It is released unchanged and can be used again
6.Biology for nursing entrance exams

Answer: C · The father's, because a sperm carries either an X or a Y

Why this is the answer

A mother (XX) can only give an X. A father (XY) makes sperm with either X or Y. An X sperm gives a girl (XX) and a Y sperm a boy (XY), so each pregnancy has about a 50% chance of each.

Answer

C · The father's, because a sperm carries either an X or a Y
7.Chemistry for nursing entrance exams

Answer: D · The splitting of a heavy nucleus into smaller nuclei

Why this is the answer

In fission, a heavy nucleus such as uranium-235 absorbs a neutron and splits into two smaller nuclei, releasing neutrons and a large amount of energy.

Answer

D · The splitting of a heavy nucleus into smaller nuclei
8.Chemistry for nursing entrance exams

Answer: A · FeCl₃

Why this is the answer

Iron(III) means Fe³⁺. Three Cl⁻ ions are needed to balance it, giving FeCl₃. Iron(II) chloride, with Fe²⁺, would be FeCl₂.

Answer

A · FeCl₃

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