Biology Paper 1 MCQ - Oct/Nov 2002
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Questions and Answers

What are the two processes involved in waste removal from the body?

Egestion and excretion.

Identify the vertebrate that is classified as a mammal based on the characteristics provided.

D.

Which specific classification is needed to identify a frog in the binomial nomenclature system?

Genus: Rana.

In liver cells, which two parts of a plant cell are present?

<p>W and Z.</p> Signup and view all the answers

In which part of the plant cell does photosynthesis primarily occur?

<p>Part Z.</p> Signup and view all the answers

At what level of organization are the ovum and the uterus categorized?

<p>Cell and organ.</p> Signup and view all the answers

What are the identifying structures X and Y in the diagram of the eye?

<p>X is the lens; Y is the retina.</p> Signup and view all the answers

What is the correct option describing sexual reproduction involving two parents?

<p>C: two parents, genetically different from parents.</p> Signup and view all the answers

Identify the hormones present in the blood of females and males depicted in the graph.

<p>Females have oestrogen and males have testosterone.</p> Signup and view all the answers

Which contraceptive method is represented by the letter C in the table?

<p>Contraceptive device (IUD).</p> Signup and view all the answers

Discuss the significance of well-watered conditions for seed germination.

<p>Well-watered conditions are crucial as they provide the necessary moisture for seeds to absorb and initiate the germination process.</p> Signup and view all the answers

What is a key characteristic that distinguishes the offspring of sexual reproduction?

<p>Offspring are genetically different from their parents.</p> Signup and view all the answers

What substance was found in the water in the test-tube after the experiment?

<p>Amino acids</p> Signup and view all the answers

Which chamber of the heart receives blood directly from the lungs?

<p>Chamber P</p> Signup and view all the answers

What is indicated by the term 'double circulation' in the context of the human heart?

<p>Blood flows twice through the heart.</p> Signup and view all the answers

Which air sample represents air that has just been exhaled?

<p>Sample B</p> Signup and view all the answers

What would be the expected appearance of the balloons in the anaerobic yeast respiration experiment after one day?

<p>Balloon Q will be inflated.</p> Signup and view all the answers

What are the two products of anaerobic respiration in yeast?

<p>Ethanol and carbon dioxide</p> Signup and view all the answers

In the context of blood flow, what does statement D imply about blood passing from Q?

<p>Blood passes directly from Q to the lungs.</p> Signup and view all the answers

Which air sample contains the highest percentage of carbon dioxide?

<p>Sample B</p> Signup and view all the answers

In the human circulatory system, which vessel first contains the breakdown products of alcohol?

<p>liver</p> Signup and view all the answers

If dye is injected into the blood supply of the kidneys and it does not appear in the excretory system, what part is likely blocked?

<p>one ureter</p> Signup and view all the answers

In a reflex action, what term is used to describe light, temperature, and chemicals?

<p>stimuli</p> Signup and view all the answers

How do the circular and radial muscles in the eye affect pupil size when light levels change?

<p>circular muscles relax, radial muscles contract</p> Signup and view all the answers

Which method of contraception is indicated as the most effective based on the pregnancy outcomes of four groups of 100 women?

<p>The method with the lowest number of pregnancies</p> Signup and view all the answers

What can be inferred about the status of balloon Q when all conditions lead to no change?

<p>Balloon Q remains inflated.</p> Signup and view all the answers

In terms of biological functions, what roles do the kidneys play in the excretory system?

<p>Filtration and excretion of waste products.</p> Signup and view all the answers

Define the term 'effectors' in the context of a reflex action.

<p>Muscles or glands that carry out the response.</p> Signup and view all the answers

What process is represented by arrow X in the carbon dioxide cycle?

<p>Photosynthesis</p> Signup and view all the answers

Which process at point P in the water cycle returns water vapour to the air?

<p>Respiration</p> Signup and view all the answers

Identify the process by which decomposing material in soil returns carbon dioxide to the atmosphere.

<p>Decay</p> Signup and view all the answers

Which process is involved in the conversion of fossil fuels into energy?

<p>Combustion</p> Signup and view all the answers

In the absence of limiting factors, how does a population typically grow over time?

<p>Exponentially</p> Signup and view all the answers

What environmental issue could arise from fertiliser runoff into a lake?

<p>Eutrophication</p> Signup and view all the answers

What do green plants absorb from the atmosphere during photosynthesis?

<p>Carbon dioxide</p> Signup and view all the answers

What is the main byproduct of respiration in living organisms?

<p>Water vapour and carbon dioxide</p> Signup and view all the answers

What are two essential characteristics common to all living organisms?

<p>All living organisms exhibit growth and reproduction.</p> Signup and view all the answers

How do organisms maintain homeostasis?

<p>Organisms maintain homeostasis through regulatory mechanisms that balance internal conditions.</p> Signup and view all the answers

Which characteristic allows organisms to respond to stimuli?

<p>The ability to respond to stimuli is facilitated by the presence of a nervous system in complex organisms.</p> Signup and view all the answers

What role does metabolism play in living organisms?

<p>Metabolism encompasses all chemical processes that convert food into energy and build cellular components.</p> Signup and view all the answers

Describe the importance of cellular organization in living organisms.

<p>Cellular organization is important as it allows for specialized functions within different cell types.</p> Signup and view all the answers

Why is evolution considered a characteristic of living organisms?

<p>Evolution occurs as organisms adapt to their environment over generations through natural selection.</p> Signup and view all the answers

How does reproduction contribute to the continuity of life?

<p>Reproduction allows organisms to produce offspring, ensuring the continuation of their genetic material.</p> Signup and view all the answers

What is the significance of growth and development in organisms?

<p>Growth and development indicate an organism's progression through life stages from birth to maturity.</p> Signup and view all the answers

Flashcards

Organisms

Living things that can carry out life processes.

Characteristics of Life

Features or traits that define something as living.

Life Processes

The activities that living things perform to stay alive.

Egestion vs. Excretion

Egestion is the removal of undigested food waste from the body, while excretion is the removal of metabolic waste products, such as urea, from the body.

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Mammal Characteristics

Mammals are characterized by having hair or fur, giving birth to live young, and producing milk to nourish their offspring.

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Binomial System

The binomial system is a scientific method of naming organisms using two words: the genus and the species. It helps to avoid confusion and ensures that all scientists use the same names for the same organisms.

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Blood Vessel for Alcohol Breakdown

The blood vessel where the breakdown products of alcohol are first detected. This vessel transports blood from the digestive system to the liver for processing.

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Blocked Excretory System

The part of the excretory system that is blocked when dye injected into the kidney's blood supply doesn't reach the bladder.

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What Triggers a Reflex?

The type of external factors that initiate a reflex action.

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Pupil Dilation

The specific muscle action responsible for increasing the size (dilating) of the pupil.

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Most Effective Contraception

The contraceptive method that results in the fewest pregnancies in a group of 100 women.

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What is an Effector?

A body part that carries out a response to a stimulus.

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What is a Stimulus?

A change in the environment that triggers a response in an organism.

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What is a Receptor?

A specialized cell that detects a stimulus.

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Sexual Reproduction

A type of reproduction involving two parents, where offspring inherit genetic material from both parents, resulting in genetic variation.

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Asexual Reproduction

A type of reproduction involving only one parent, where offspring are genetically identical to the parent.

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Hormones in Females

The primary female sex hormone is estrogen, responsible for developing and maintaining female characteristics.

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Hormones in Males

The primary male sex hormone is testosterone, responsible for developing and maintaining male characteristics.

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Conditions for Seed Germination

Seeds need water, warmth, and oxygen to germinate.

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Partially permeable membrane

A membrane that allows some substances to pass through but not others, based on size and charge. It acts as a selective barrier.

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What is found in the water after protease breaks down proteins?

After protease breaks down proteins, amino acids are found in the water. Protease is an enzyme that breaks down proteins into smaller units called amino acids.

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Double circulation of blood

This means the blood flows through the heart twice for every complete circuit of the body. This allows for efficient oxygenation and delivery of nutrients to the whole body.

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Identify exhaled air

Air that has been breathed out is characterized by lower oxygen levels, higher carbon dioxide levels and higher humidity compared to inhaled air.

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Anaerobic respiration of yeast

This process occurs when yeast breaks down sugar in the absence of oxygen. This produces carbon dioxide as a by-product, causing the balloon to inflate.

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Chamber 'S' in the heart

Chamber 'S' in the heart is the left atrium, which receives oxygenated blood directly from the lungs.

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Blood flow direction in the heart

Blood flows from the left ventricle to the aorta and then to the body. It then returns to the right atrium from the body before being pumped to the lungs.

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Which chamber directly receives blood from the lungs?

The left atrium receives blood directly from the lungs. The left atrium is part of the heart's double circulation system, receiving oxygen-rich blood from the lungs.

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Carbon Dioxide Cycle

The continuous movement of carbon dioxide between the atmosphere, living organisms, and the Earth.

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Respiration

The process by which living organisms break down food to release energy, producing carbon dioxide as a byproduct.

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Photosynthesis

The process by which plants use sunlight, water, and carbon dioxide to produce their own food, releasing oxygen as a byproduct.

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Combustion

The rapid chemical reaction between a substance and oxygen, releasing heat and light, often producing carbon dioxide.

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Decay

The breakdown of dead organisms or organic matter by microorganisms, releasing carbon dioxide.

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Water Cycle

The continuous movement of water on, above, and below the surface of the Earth.

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Condensation

The process by which water vapor in the air changes to liquid water, forming clouds.

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Limiting Factors

Environmental conditions that restrict population growth, such as food, water, and space.

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Levels of Organization

The organization of living things starts with cells, then tissues (groups of similar cells), then organs (groups of tissues working together), and finally organ systems.

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Plant Cell Structure

Plant cells have a cell wall for support, a large vacuole for storage, and chloroplasts for photosynthesis.

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Photosynthesis Location

Photosynthesis takes place in the chloroplasts of plant cells. It uses sunlight, carbon dioxide, and water to produce glucose (food) and oxygen.

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Female Reproductive System

The female reproductive system includes the uterus, where a baby develops, and the ovaries, which produce eggs.

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Eye Structure

The lens of the eye focuses light onto the retina, where light signals are converted into nerve impulses that are sent to the brain.

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Study Notes

Biology Paper 1 Multiple Choice - October/November 2002

  • Exam Duration: 45 minutes
  • Paper Code: 0610/1
  • Number of Questions: 40
  • Instructions:
    • Do not open the booklet until instructed.
    • Write your name, center number, and candidate number on the answer sheet.
    • Answer all questions. Choose one correct answer (A, B, C, or D) and record it on the separate answer sheet.
    • Read instructions carefully on the answer sheet.

Characteristics of Living Organisms

  • All organisms exhibit egestion and excretion, or egestion and nutrition, or excretion and nutrition, or nutrition and photosynthesis.

Vertebrate Classification

  • Mammals are vertebrates that exhibit the characteristic of having hair.
  • Mammals also lay eggs, have scales, feathers, wings, or are covered with scales.

Biological Classification

  • For classifying a frog, the needed information is the genus (e.g., Rana) and the class (e.g., amphibian).
  • The phylum, kingdom, or class level are not enough to precisely classify a frog

Plant Cell Structures

  • Parts common to plant and liver cells are W and X or W and Z.
  • Photosynthesis occurs in structure Y in a plant cell.

Levels of Organization

  • Ovum and uterus are both organs in the female reproductive system.

Structures of the Eye

  • Structures X and Y in an eye diagram represent organs that are part of a larger organ system.

Plant Cell Response to Solution

  • The changes in plant cell appearance after 30 minutes in a concentrated solution are depicted by the provided diagram.

Oxygen Movement

  • Oxygen moves into root hair cell cytoplasm through diffusion.

Enzyme Actions

  • Enzymes are catalysts.
  • Enzyme activity is dependant on various factors, such as pH and temperature.

Enzyme Activity and Graphing

  • The horizontal axis of an enzyme activity graph should represent temperature.

Xylem Vessel Structure

  • Xylem vessels have thick side walls and absent thick end walls.

Photosynthesis Products

  • The products of photosynthesis are oxygen and sugar.

Gaseous Exchange in Leaves

  • Gaseous exchange, primarily the intake of carbon dioxide and release of oxygen, takes place between points Q and S of the leaf diagram.

Digestible Nutrients

  • Starch is the only nutrient in the provided table that requires no digestion.

Diffusion Experiment

  • After 15 minutes in the diffusion experiment, amino acids were found in the surrounding water from the tube

Human Heart Chambers

  • Blood flows into the heart's chamber P(the right atrium) directly from the lungs

Blood Circulation

  • Double circulation means blood travels through the heart twice in a complete circuit of the body.

Air Sample Analysis

  • The air sample that contains 4% carbon dioxide and 20% oxygen.

Anaerobic Respiration in Yeast

  • After a day, the balloon labelled 'P' containing yeast, sugar, and water should inflate in the provided anaerobic respiration experiment.

Alcohol Breakdown

  • Blood vessels containing the breakdown products of alcohol are first found in the liver.

Kidney Dye Experiment

  • A blocked portion will prevent dye from traveling.

Reflex Action Components

  • Light, temperature, and chemical stimuli are all detected by sensory receptors in a reflex response.

Pupil Size Regulation

  • The radial muscles contract to enlarge the pupil when the circular muscles are relaxed.

Contraception Effectiveness

  • The pill is the most effective method of contraception among the options presented in the graph.

Modes of Reproduction

  • Sexual reproduction involves two parents producing offspring that are genetically different.

Hormones and Age

  • The hormones visible in the graph are oestrogen in females and testosterone in males.

Seed Germination

  • For germination, seeds require suitable warmth, oxygen, and the lack of/absence of carbon dioxide

Growth Curve Analysis

  • Fresh mass is the most accurate variable for the y-axis of a growth curve

Chromosomes and Sex Determination

  • The combination of an X sex chromosome in both the egg and sperm leads to a female child.

Sperm Cell Structure

  • The head of a sperm cell contains genes.

Mendelian Genetics

  • Crossing Rr plants with Rr plants will result in a proportion of 3 round seeds to every 1 wrinkled seeds.
  • The results of the breeding experiment based on the genotypes are shown above.

Simplified Food Web

  • The sun is the source of energy in the given food chain diagram.

Food Chain Energy Loss

  • The least energy is lost in the food chain involving potatoes and humans.

Photosynthesis Representation

  • The process of photosynthesis is represented by arrow X in the diagram.

Water Cycle Process

  • Condensation will return water vapor to the air.

Population Growth

  • Graph C shows the growth of a population without limiting factors, showcasing unchecked growth.

Fertiliser Impact

  • The fertiliser increase plant growth both in the fields and the lake.

Pesticide Concentration

  • The pesticide concentration in the bird of prey is the highest according to the food chain diagram showing the trophic levels.

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Test your knowledge with this multiple-choice quiz covering core topics from Biology Paper 1. With 40 questions, it explores characteristics of living organisms, vertebrate classification, and biological classification. Perfect for students preparing for their exams!

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