A Level Biology MCQs

A Level Biology MCQs

GCSE A level biology quiz questions and answers to practice biology tests, A level biology MCQs with answers,exam prep questions with MCQs to help in biology entry tests.

Q1: Cells are not tightly packed in

  1. Epidermis layer
  2. Mesophyll layer
  3. Endodermis
  4. Stomatal pores


Q2: Gene for genetic disease cystic fibrosis is located on chromosome number

  1. 7
  2. 21
  3. 28
  4. 42


Q3: Thickest part in three layers of arteries, is

  1. Tunica intima
  2. Tunica externa
  3. Tunica media
  4. All the above


Q4: Structure of enzyme is

  1. 2 dimensional coiled strands
  2. 3 dimensional coiled strands
  3. Long unbranched chains
  4. Short branched chains


Q5: COPD stands for

  1. Cuticular Obstetric Pelvic Disease
  2. Critical Obstructive Pituarity Disorder
  3. Chronic Obstructive Pulmonary Disease
  4. Chronic Obesity Personal Decision


Q6: Reabsorption of useful molecules or ions in kidneys occur through

  1. Diffusion
  2. Active Transport
  3. Partial osmosis
  4. Differential osmosis


Q7: Concentration gradient is said to exist when the

  1. Concentration of ions is more inside the cell and less outside the cell
  2. Concentration of ions is lesser inside the cell and more outside the cell
  3. Hypertonic solution enters the cells
  4. Water enters by osmosis


Q8: Blood is provided to Glomerulus through

  1. Afferent arteriole
  2. Efferent arteriole
  3. Renal artery
  4. Renal vein


Q9: Vancomycin is

  1. An infectious disease
  2. A virus
  3. An antibiotic
  4. Is an antiviral


Q10: Which statement is incorrect? Effective antibiotics

  1. Show selective toxicity
  2. kill the host cell
  3. kill the pathogens
  4. Are useless against virus

Q11: Fitting of substrate in active site is called as

  1. Hydrolysis
  2. Condensation
  3. Polymerization
  4. Lock and key hypothesis


Q12: Plant transport system does not transport

  1. CO2
  2. Organic salts
  3. Water
  4. Plant hormones


Q13: Process in which a chemical substance extend to an adequate concentration, at a certain site in body and have capability to produce an unwanted effect in body is termed as

  1. Poisoning
  2. Toxicity
  3. Sensitivity
  4. Adverse effect


Q14: Building blocks of nucleic acids are

  1. Nucleotides
  2. Amino acids
  3. Proteins
  4. Lipids


Q15: A pentose, nitrogen and phosphate are combined to form

  1. Peptide bond
  2. Nucleotide
  3. Nucleoside
  4. Lipid


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