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

Where does fertilisation most commonly take place?

  1. ABody of the uterus
  2. BCervix
  3. COvary
  4. DAmpulla of the uterine tube
2.Human anatomyHard

A pituitary tumour grows upwards and causes loss of both outer (temporal) halves of the visual field. Where is the visual pathway compressed?

  1. AOptic chiasm
  2. BRight optic nerve
  3. COccipital cortex
  4. DLeft optic tract
3.Human physiologyMedium

According to Poiseuille's law, if the radius of an arteriole halves, its resistance to flow:

  1. ADoubles
  2. BIncreases 4-fold
  3. CIncreases about 16-fold
  4. DHalves
4.Human physiologyHard

Which adaptation develops over days to weeks at high altitude?

  1. AHigher erythropoietin levels and more red blood cells
  2. BLower ventilation to save oxygen
  3. CIncreased renal bicarbonate retention
  4. DA fall in haematocrit
5.Biology for nursing entrance examsMedium

Why can small nonpolar molecules cross the cell membrane easily while ions cannot?

  1. AIons are larger than most membrane proteins
  2. BThe membrane carries a strong positive charge
  3. CThe bilayer's core is made of hydrophobic tails
  4. DThe membrane is made mostly of long carbohydrate chains
6.Biology for nursing entrance examsHard

A DNA template strand reads 3'-TACGGA-5'. What is the mRNA made from it?

  1. A5'-AUGCCU-3'
  2. B5'-TACGGA-3'
  3. C5'-ATGCCT-3'
  4. D5'-UACGGA-3'
7.Chemistry for nursing entrance examsMedium

Radioactive iodine (iodine-131) is used to treat some thyroid conditions. Why does it reach the thyroid?

  1. AThe thyroid gland takes up iodine to make its hormones
  2. BIodine is strongly attracted to the metal ions stored in the neck
  3. CIodine-131 is not radioactive inside the body
  4. DRadiation is always drawn toward the head
8.Chemistry for nursing entrance examsHard

A patient's temperature is 104 °F. What is it in degrees Celsius?

  1. A58 °C
  2. B43 °C
  3. C40 °C
  4. D72 °C

3Solutions

1.Human anatomy

Answer: D · Ampulla of the uterine tube

Why this is the answer

Fertilisation usually occurs in the ampulla of the uterine (fallopian) tube. The embryo then travels to the uterus to implant.

Answer

D · Ampulla of the uterine tube
2.Human anatomy

Answer: A · Optic chiasm

Why this is the answer

Bitemporal hemianopia results from compression of the crossing nasal fibres at the optic chiasm, which lies directly above the pituitary gland.

Answer

A · Optic chiasm
3.Human physiology

Answer: C · Increases about 16-fold

Why this is the answer

Resistance is proportional to 1/r⁴, so halving the radius raises resistance by 2⁴ = 16. This is why small changes in arteriole diameter control blood flow so strongly.

Answer

C · Increases about 16-fold
4.Human physiology

Answer: A · Higher erythropoietin levels and more red blood cells

Why this is the answer

Hypoxia stimulates EPO and red cell production, raising oxygen-carrying capacity. Hyperventilation causes alkalosis, which the kidneys compensate by excreting bicarbonate.

Answer

A · Higher erythropoietin levels and more red blood cells
5.Biology for nursing entrance exams

Answer: C · The bilayer's core is made of hydrophobic tails

Why this is the answer

The core of the membrane is formed by water-fearing (hydrophobic) fatty acid tails. Nonpolar molecules dissolve in it and pass through, but charged ions are repelled and need channel or carrier proteins.

Answer

C · The bilayer's core is made of hydrophobic tails
6.Biology for nursing entrance exams

Answer: A · 5'-AUGCCU-3'

Why this is the answer

The mRNA is complementary and antiparallel to the template: T→A, A→U, C→G, G→C, giving AUG CCU. The start codon AUG codes for methionine.

Answer

A · 5'-AUGCCU-3'
7.Chemistry for nursing entrance exams

Answer: A · The thyroid gland takes up iodine to make its hormones

Why this is the answer

The thyroid absorbs iodine to make thyroid hormones and cannot tell radioactive iodine from normal iodine. So iodine-131 collects in the gland, where its radiation can destroy overactive thyroid tissue.

Answer

A · The thyroid gland takes up iodine to make its hormones
8.Chemistry for nursing entrance exams

Answer: C · 40 °C

Why this is the answer

°C = (°F − 32) × 5/9 = (104 − 32) × 5/9 = 72 × 5/9 = 40 °C. Forgetting a step gives 72 °C (no multiplication) or about 58 °C (no subtraction).

Answer

C · 40 °C

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