NEW
Font size
Worksheetsobjective questions
Total questions: 40
Worksheet time: 1hrs 8mins
Which is the following careers is related to the fields of biology?
Chemical engineer
Quantity surveyor
Physioterapist
Welder
Diagram shows a biohazard plastic bag.
Which of the following should be packed in a biohazard plastic bag before disposal?
Glass
Scalpel
Nutrient broth
Plastic culture container
Diagram shows an animal cell.
What is X?
Nucleus
Ribosome
Mitochondrian
Smooth endoplasmic reticulum
Which component is located closest to the rough endoplasmic reticulum?
Lysosome
Ribosome
Mitochondrion
Golgi apparatus
Diagram shows a component found in abundance in the muscle cells of insects.
What happens if this component is absent in the muscle cells of the wings of termite swarmer?
The wings will be detached
The termite can only walk
The wings cannot be flapped
The termite will die
Diagram shows the movement of glucose molecule across the plasma membrane through process Q.
What is process Q?
Osmosis
Simple diffusion
Active transport
Facilitated diffusion
Diagram shows the process involved in the preservation of cucumbers. The cucumbers were immersed in solution P for 2 months.
Which graph shows the changes of the mass of the cucumbers during the process?
Diagram shows a plant cell.
Which of the following best describes the condition of the cell?
The cell has been immersed in an isotonic solution
Molecules of water have entered the cell
The cell has become less turgid
The cell undergo deplasmolysis
Ali suffered from diarrhoea after drinking cultured milk that has expired. Which of the following substances is the best to cure Ali?
Rehydration drink
Reverse osmosis water
Saline solution
Isotonic drink
Which of the following is a polysaccharide?
Starch
Sucrose
Fructose
Glucose
Which of the following molecules makes phospholipid bilayer stronger, flexible and less permeable to water-soluble substances?
Channel protein
Carrier protein
Glycoprotein
Cholesterol
A group of biology students discovered a white powder that tastes sweet. When the Benedict test is performed, a negative result is obtained. What could the white powder probably be?
Galactose
Fructose
Sucrose
Glucose
Which of the following is an example of steroids?
Wax
Cholesterol
Phospholipid
Triglyceride
Which of the following is the characteristic of saturated fats that make them different from unsaturated fats?
They have C-C double bonds in their structure.
They have lower melting point.
They can be more easily broken down by lipase.
They exist as liquids in room temperature
Diagram shows the structure of a nucleotide.
What is represented by the unit labelled as X?
Phosphate group
Pentose group
Nitrogenous base
Sulphate group
Which of the following is true about enzyme reaction at 50oC?
The reaction decreases
The reaction increases
The reaction is at maximum
The reaction remains the same
Which of the following is true about an enzyme and its uses?
Protease is used to tenderize meat
Amylase is used to soften vegetables
Lactase is used in processing fruit juice
Cellulase is used to reduce the protein content in food
Diagram shows the lock and key hypothesis which explains how an enzyme breaks down a substrate.
Which of the following statements is NOT true about the diagram?
The enzyme and substrate combine into an enzyme-substrate complex.
The shape of substrate allows it to combine with the active site of the enzyme
The shape of the active site of the enzyme does not allow the substrate to combine with it.
The substrate is broken down into two or more substrate
Which of the following enzymes is used in the production of fruit juice?
Pectinase
Lactase
Amylase
Trypsin
Diagram shows the phases of a cell cycle in an organism.
What is the phase for synthesis and replication of DNA?
G1
S
G2
M
What happens during anaphase II in the meiosis of animal cells?
Synapsis occurs
Crossing over occurs
Sister chromatids move to the opposite poles of the cell
Homologous chromosomes move to the opposite poles of the cell
Diagram shows the behavior of homologous chromosomes during meiosis.
Which of the following is true about the product of this homologous chromosome behavior?
Homologous chromosomes come together to form a bivalent
Replication of the chromosomes takes place.
New recombination of DNA is produced.
Synapsis occurs
Which of the following processes does not involve mitosis?
Repair of damaged skin tissue
Growth of muscles
Production of sperm cells
Production of white blood cells
Diagram shows the karyotype of a man.
From the karyotype, we can see that the man has abnormal number of chromosomes caused by mutation. At which phase of the cell division does this mutation occur?
Prophase I
Anaphase I
Metaphase I
Telophase I
Which of the following is the importance of mitosis?
Crossing over causes variation
Enables trait inheritance from parents to offspring
Produces new cells to replace dead or damaged cells
Maintains the number of chromosomes in organisms after fertilizations
Mr. Karim needs many banana seedlings to be planted on his farm. He plans to plant banana seedlings from tissue culture. What is possible risk faced by Mr. Karim?
Late harvesting of bananas
There is no variation in the harvested bananas
A disease attack can cause all the banana plants to die
Low price of the fruits when all the bananas mature at the same time
How many pairs of homologous chromosomes does a human male liver cell have?
21
23
22
46
What is the function of cellular respiration?
To produce carbon dioxide for cell
To produce energy for the cell
To increase the concentration of glucose in the cell
To produce lactic acid for the cell
The following equation shows the fermentation process that takes place in yeast.
What are P and Q?
Ethanol and carbon dioxide
Ethanol and lactic acid
Lactic acid and oxygen
Lactic acid and carbon dioxide
What is meant by fermentation process?
An incomplete breakdown of glucose in the absence of oxygen
The complete breakdown of glucose in the absence of oxygen or limited amount of oxygen
An incomplete breakdown of glucose in the presence of oxygen
The complete breakdown of glucose in the presence of oxygen
The graph shows an athlete's rate of oxygen uptake before, during and after a 5 minute period of exercise. The consumption of oxygen is shown as the shaded part.
What represents the unshaded part of the graph?
The amount of oxygen taken into the body.
The amount of oxygen used during exercise
The amount of oxygen used to pay off the oxygen debt.
The excess oxygen in the lungs.
An athlete is running a 100m race. The following changes take place in the athlete's body during the race.
Which sequence is correct?
K → L → M → N
L → N → M → K
N → K → L → M
N → M → L → K
Figure shows an apparatus set-up in an experiment.
What conclusion can be drawn from this experiment?
I) Yeast carries out aerobic respiration to produce carbon dioxide
II) Yeast carries out anaerobic respiration to produce carbon dioxide
III) Yeast carries out respiration to produce energy
IV) Yeast carries out respiration to produce alcohol.
I and II
II and III
III and IV
I and IV
Which of the following statements is the similarity between aerobic respiration and fermentation in yeast?
Carbon dioxide is produced.
Ethanol is produced
Glucose is completely broken down
Both processes require oxygen
Which structure in the respiratory system of humans has large surface area for gaseous exchange?
Trachea
Alveolus
Bronchus
Bronchiol
Diagram shows the tracheal system in a grasshopper.
What are the adaptations of the tracheal system that allow efficient gaseous exchange?
I)A large respiratory surface area
II)The respiratory structure is thick
III)The respiratory surface is always moist
IV)The respiratory surface is rich in blood capillaries
I and II
I and III
II and IV
III and IV
Diagram shows a cross section of an alveolus and a blood capillary.
What will happen at the alveolus and the blood capillary when a person inhales?
I) More oxyhemoglobin will be formed.
II) Oxygen diffuses from P into blood capillary
III) The partial pressure of oxygen in P is lower than that in the blood capillary.
IV) The partial pressure of carbon dioxide in P is higher than that in the blood capillary.
I and II
II and III
III and IV
I and IV
How is the efficiency of gaseous exchange increased in fish?
By opening and closing of operculum
By decreasing the mouth cavity
By increasing the blood flow beneath the skin
By counter current flow of water and blood
What will happen if alveoli are torn and punctured?
Gasping
Sneezing
Shivering
Coughing
Diagram shows the comparison between the structures of the normal alveoli and the alveoli of emphysema patient.
Why does the gaseous exchange become less efficient for an emphysema patient?
Excessive amount of mucus is produced inside the alveoli
The surface area of the alveoli is reduced
The walls of the alveoli are less moist
The walls of the alveoli become swollen and thick
