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WorksheetsA Level Biology - A Random Mix of Challenging MCQ
Total questions: 20
Worksheet time: 10mins
In relation to the human genome, which of the following is correct?
The DNA genome is coded by 4 different bases
The sugar backbone of the DNA strand is formed of glucose
DNA is found in the nucleus of bacteria
With regards to animal mitochondria, which of the following is correct?
Mitochondria is NOT necessary for aerobic respiration
Mitochondria is the sole cause of sperm cell movement
Mitochondria are more abundant in fat cells than in skeletal muscle
Mitochondria are enveloped by a double membrane
In bacteria, which of the following is FALSE?
Bacteria always cause disease
Bacteria contain plasmid DNA
Bacteria do not contain mitochondria
Some bacteria are susceptible to antibiotics
Which of the following is correct regarding active transport?
ATP is necessary and sufficient for active transport
ATP is not necessary but sufficient for active transport
The relative concentrations of the material being transported have little impact on the rate of active transport
Active transport relies on transport proteins that are powered by an electrochemical gradient
Concerning mammalian reproduction, which of the following is FALSE?
Fertilisation involves the fusion of two gametes
Reproduction is sexual and the offspring display genetic variation
Embryonic growth requires carefully controlled mitosis
Mammalian gametes are diploid cells produced by meiosis
What is the primary reason that pH is controlled so tightly in humans?
To allow rapid protein synthesis
To allow for effective digestion throughout the intestinal tract
To prevent changes in electrical charge in polypeptide chains
To prevent changes in core body temperature
Which of the following is the best definition of a mutation?
A mutation is a permanent change in DNA
A mutation is a permanent change in DNA that is harmful to an organism
A mutation is a permanent change to the structure of intra-cellular organelles caused by changes in DNA/RNA
A mutation is a permanent change in chromosomal structure caused by DNA/RNA changes
Which of the following is the most accurate definition of an antibody?
An antibody is a molecule that protects red blood cells from changes in pH
An antibody is a molecule produced only by humans and has a pivotal role in the immune system
An antibody is a toxin produced by a pathogen to damage the host organism
An antibody is a molecule that is used by the immune system to identify and neutralise foreign objects and molecules
Which of the following statements is true?
There is more energy and biomass each time you move up a trophic level
There is less energy and biomass each time you move up a trophic level
There is more energy but less biomass each time you move up a trophic level
There is no difference in the energy or the biomass when you move up a trophic level
The cell membrane:
Is made up of a phospholipid bilayer which only allows active transport across it
Is not found in bacteria
Is a semi-permeable barrier to ions and organic molecules
Consists purely of enzymes
Which of the following statements concerning the cardiovascular system is correct?
Oxygenated blood from the lungs flows to the heart via the pulmonary artery
All arteries carry oxygenated blood
All animals have a double circulatory system
All veins have values
none of the above
Which part of the digestive system has the least amount of enzymatic digestion occurring?
Mouth
Stomach
Small intestine
Large Intestine
Rectum
Which of the following statements is true?
Protein synthesis occurs solely in the nucleus
Each amino acid is coded for by three DNA bases
Each protein is coded for by three amino acids
Protein synthesis isn't necessary for mitosis to take place
none of the above
Which of the following statements is correct?
Adrenaline can sometimes decrease heart rate
Adrenaline is rarely released during flight or fright responses
Adrenaline can cause an increase in heart rate
Adrenaline only affects the cardiovascular system
Celestial Necrosis is a newly discovered autosomal recessive disorder. A female carrier and a male with the disease produce two boys. What is the probability that neither boy's genotypes contain the celestial necrosis allele?
100%
75%
50%
0%
Which of the following statements is correct about enzymes?
All enzymes are made on amino acids only
Enzymes can sometimes slow the rate of reactions
Enzymes are heat sensitive but resistant to changes in pH
Enzymes are unspecific in the substrate use
none of the above
The genetic code states ...
The code is universal
The code is degenerate
The code is non-overlapping
All of the above
Which of the following components of a food chain represents the largest biomass?
Producers
Consumers
Decomposers
Peter goes to see his GP with fatty, smelly stools that float on water. Which of the following enzymes is most likely to be malfunctioning?
Amylase
Lipase
Protease
Sucrase
Lactase
Which of the following equations represents anaerobic respiration in animals?
Carbohydrate + oxygen = Energy + carbon dioxide + water
Carbohydrate = Energy + lactic acid + carbon dioxide
Carbohydrate = Energy + lactic acid
Carbohydrate = energy + ethanol + carbon dioxide
