WorksheetsSkor A+ Paper 1 F4
Total questions: 50
Worksheet time: 17mins
Which of these elements is not found in large amounts in the cell ?
Sulphur
Oxygen
Hydrogen
Carbon
What is the importance of nucleic acids?
Build cells during growth
Build cells during growth
Required for the synthesis of antibodies
Carry genetic material
What is the major function of monosaccharide in animals?
Regulates metabolism
Acts as structural material
Acts as food reserve
Releases energy
What is the monomer of carbohydrates?
Glycerol
Nucleotide
Polysaccharide
Simple sugar
The formula for disaccharide is
C2H10O11
C6H12O6
C12H22O11
(C6H12O6)n
Which of the following are reducing sugars ?
Glucose
Fructose
Sucrose
Lactose
Haemoglobin is an example of a
primary structure of protein
secondary structure of protein
tertiary structure of protein
quaternary structure of protein
Amino acids are linked together to form a
polypeptide
polynucleotide
polysaccharide
polysaccharide
Which of the following statements are true about essential amino acids?
They cannot be synthesised by human body from other compounds
They must be taken in with food
They include lysine and valine
They are derived from other amino acids.
A lipid is formed by condensation of
Amino acids and glucose
Amino acids and glycerol
Fatty acids and glycogen
Fatty acids and glycerol
Diagram shows the mechanism of enzyme action. Which property of enzyme is shown in the diagram?
Enzyme structure is denatured by extremes of pH
Temperature affects the rate of enzyme reaction
Enzyme reaction is non-specific
Structure of enzyme remains unchanged at the end of the reaction.
Which of the following is true about the function of organelles P
Secretes enzyme for digestion
Site for synthesis of lipid
Form spindle fibres during cell division
Site for synthesis of protein
Which of these organelles are found in abundance in pancreatic cell?
Lysosomes, Endoplasmic reticulum and Golgi apparatus
Endoplasmic reticulum and Golgi apparatus
Lysosomes and Golgi apparatus
Golgi apparatus only
Which tissue in Diagram shows the correct match?
W=Parenchyma
X=Colenchyma
X= xylem
z=Phloem
Diagram shows the structure of the plasma membrane according to the fluid mosaic model. What is X?
Carrier protein.
Carrier protein.
Permeable layer.
Phospholipid bilayer.
Which of the following statements about plasma membrane are true?
It is composed mainly of glycoproteins and cholesterol
The components of the plasma membrane are rigid and static.
Pore protein and carrier protein are wholly embedded in the membrane.
Cholesterol in the phospholipid bilayer stabilise and strengthen the plasma membrane
Which of the following statements about the diagram are true?
Q is a carrier protein
The process is called active transport.
This process requires energy (ATP).
The process is against the concentration gradient
Name the process that takes place in the cell of mangoes?
Plasmolysis
Deplasmolysis
Crenation
Turgidity
A farmer uses too much fertiliser on his vegetable plant. What is the effect of the fertiliser to the plant.
The plant become turgid
The plant cells are full of water.
The water diffuses into the plant cells
The plant wilts.
Diagram shows a plant cell undergoing division process.What is the division phase?
Prophase
Metaphase
Anaphase
Telophase
Which of the following statements does not state the importance of mitotic cell division?
Replace dead cells
Produce gamete cells
Repair damaged cells
Increase the number of cells
Which of the following is correct about uncontrolled cell division?
Substances such as formaldehyde can cause cancer
When cancerous cells divide uncontrollably, a tumor is formed
When formed, cancerous cells can compete with normal cells for nutrients and energy
Uncontrolled meiosis occurs due to severe disruption to the mechanism that controls the cell division
Which of the following cells is a product of meiosis?
Diagram shows an event during meiosis.Which of the following describes the event?
Spindle fibre breaks down
Change of genetic materials occur
Reformation of nuclear membrane
Chromosomes replication takes place
Which of the following plant structures undergoes meiosis?
Leaves
Flowers
Pollen grains
Epidermal cells
Organisms which are not able to synthesize their own food are
autotrophs.
heterotrophs.
parasites
saprophytes.
Which vitamins can be produced by bacterial action in the large intestine?
Vitamin A
Vitamin B complex
Vitamin E
Vitamin K
A sample of urine taken from a person suffering from diabetes mellitus was boiled with Benedict's solution. Which of the following results can be obtained?
The mixture becomes purple
A purple precipitate was formed
A brick-red precipitate was formed
The mixture becomes blue.
Which of the following diseases is due to the lack of vitamin in the diet?
Xerophthalmia
Rickets
Pellagra
Haemophilia
Which of the following parts of the human digestive system shown DiagramA does not produce enzymes?
A
B
C
D
Which of the following are functions of the liver?
Destruction of red blood cells
Regulation of blood sugar level
Conversion of excess amino acids into urea
Synthesis of bile
Nutrients that can be found in X are
glucose
vitamin D
vitamin C
amino acids
In which part of the large intestine shown in the below diagram are heamorrhoids found?
Anus
Rectum
colon
Appendix
The victim with the characteristic above refer to
obesity
bulimia nervosa
diabetes mellitus
anorexia nervosa
Plants from different habitats are adapted to carry out photosynthesis. Which of the following is not the right adaptation for the following plant?
Bunga Raya or Hibiscus have more stomata at the lower epidermis
Water Lily have only stomata at the upper surface of the leaf
Hydrilla only have chloroplast at the leaf
The stem of cactus have many chloroplast
Diagram shows the structure of an organelle in plant cell. Which of the following process occurs in structure Q?
Reduction of carbon dioxide
Water photolysis
Respiration
Synthesis of protein
Why the rate of photosynthesis is low in the morning and evening and high during midday?
Light intensity are low and temperature is high in the morning
Light intensity are high and temperature are low in the morning
Light intensity and temperature are at the highest during midday
Dark reaction starts at night when there is no light
The equation above is glucose fermentation by yeasts. What is R and S?
Ethanol and Oxygen
Lactic acid and Oxygen
Ethanol and Carbon dioxide
Lactic acid and ethanol
A student exhaled air several times onto a piece of dry cobalt chloride paper. He noticed that the paper changed from blue to pink. Another piece of dry cobalt chloride paper that have been placed in an open Petri dish remained blue for the duration of the experiment (1 minute) What is the conclusion of the experiment?
Exhaled air contains more oxygen than inhaled air
Exhaled air contains more carbon dioxide than inhaled air
Exhaled air contains more water vapour than inhaled air
Exhaled air contains more heat energy than inhaled air
When a person lives at high altitudes for a long time, he becomes acclimatised to the low partial pressure of oxygen by increasing the
total number of red blood cells
total haemoglobin content
ventilation rate
rate of heart beat
Diagram shows three different types of interactions between organisms. What of the following is true about the interactions K, L and M?
K=Mutualism
L=Commensalism
M=Parasitism
Diagram shows a pyramid number of an ecosystem. Which of the following is N?
Bird
Spider
Grasshopper
Green Plant
Diagram shows the root structure of a mangrove tree. What is the structure R
Knee root
Prop root
Buttress root
Aerial root
Which of the following taxa are lower in rank than “Order”?
Phylum, genus, species
Phylum, class, genus
Family, genus, species
Family, class, species
Diagram shows two organisms that can be found in fresh water pond. Which kingdom do these organisms belong to?
Monera
Protista
Fungi
Plantae
Which of the following diseases can be transmitted through contact?
Malaria
Cholera
Ringworm
AIDS
The release of excess heat to the atmosphere is due to
Electric generating stations
Glass buildings
Burning of forest
Acid rain on the earth
Which of the following is not a result of global warming?
Change in wind direction and the distribution of rainfall
Acid rain
Decline in the yield of crops
Floods in low lying countries
Which of the following will produce CFC (Chlorofluorocarbon)?
Air conditioner
Fire extinguisher
Polystyrene
Water evaporation
The amount of carbon dioxide in the atmosphere can be reduced by
Respiration.
Combustion.
Photosynthesis.
Exhalation
