Bio and Chem (Grade 10)
68 Questions
4 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

If kangaroos have 16 chromosomes in their skin cells, what would be the number of chromosomes in a kangaroo egg cell?

  • 16
  • 8 (correct)
  • 4
  • 32

    • Which component of a cell directly results in the synthesis of a specific protein?

  • Cytoplasm
  • Gene (correct)
  • Chromosome
  • Nucleus

    • In the structure of DNA, which combination of base pairs is correct?

  • Adenine and Thymine (correct)
  • Guanine and Thymine
  • Adenine and Guanine
  • Cytosine and Adenine

    • What is the correct sequence of structures in increasing complexity?

    <p>red blood cell, heart muscle, heart, circulatory system</p> Signup and view all the answers

    Which event best describes fertilization?

    <p>Combining of male and female nuclei</p> Signup and view all the answers

    How does the base-pairing rule contribute to the structure of DNA?

    <p>By maintaining consistent width of the DNA double helix due to specific base pairings</p> Signup and view all the answers

    Which element is not present in cryolite?

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

    What characteristic does a compound have?

    <p>Contains two or more different elements</p> Signup and view all the answers

    Which of the following processes cannot break down a compound?

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

    What atomic ratio does cryolite maintain between aluminium and fluorine?

    <p>1:6</p> Signup and view all the answers

    Which of the listed substances likely has the highest $R_1$ value in the chromatogram?

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

    What is the correct formula of cryolite?

    <p>Na3AlF6</p> Signup and view all the answers

    Which term describes an individual with two different alleles for a characteristic?

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

    Which genotype represents an individual that is homozygous recessive for a particular trait?

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

    Why might being heterozygous for sickle cell anaemia be beneficial in some human populations?

    <p>Heterozygous individuals are more resistant to malaria.</p> Signup and view all the answers

    Which combination correctly identifies females without condition and males with condition in a pedigree diagram?

    <p>Unfilled circle and shaded square</p> Signup and view all the answers

    What is the complementary DNA sequence for ATTGGACGGT?

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

    Which statements are correct regarding the inheritance of a recessive condition on a pedigree diagram? 1. P and Q are heterozygous. 2. Q and R have different genotypes. 3. P and R have the same genotype.

    <p>2 and 3 only</p> Signup and view all the answers

    Which statement is NOT correct about IVF?

    <p>IVF is not expensive and everyone can afford it.</p> Signup and view all the answers

    Which option correctly identifies the molecule diagram corresponding to carbon dioxide?

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

    Among diagrams W, X, Y, and Z, which one represents a single atom?

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

    Which of the following statements about the diagrams W, X, Y, and Z is accurate?

    <p>W, Y, and Z are molecules and X is an atom.</p> Signup and view all the answers

    Which statement is FALSE according to the given content?

    <p>IVF is available to everyone.</p> Signup and view all the answers

    If a DNA sample has 35% of its bases as G, what is the percentage of A?

    <p>35%</p> Signup and view all the answers

    What defines a phenotypic variation?

    <p>A change in the physical appearance or trait</p> Signup and view all the answers

    In a chromosome with 6125 pairs of bases and 2345 bases being G, how many bases in this chromosome are A?

    <p>3675</p> Signup and view all the answers

    Which option represents a result of a heterozygous yellow-flowered plant crossed with a red-flowered plant?

    <p>50% yellow flowers, 50% red flowers</p> Signup and view all the answers

    A gene mutation is caused by which of the following?

    <p>A change in the base sequence of DNA</p> Signup and view all the answers

    What is the result of crossing two heterozygous yellow-flowered plants?

    <p>75% with yellow flowers, 25% with red flowers</p> Signup and view all the answers

    What is the derived chemical formula for aluminium phosphate?

    <p>AlPO4</p> Signup and view all the answers

    Which two processes can effectively separate a sample of water contaminated with insoluble chalk and a soluble salt?

    <p>filtration and crystallisation</p> Signup and view all the answers

    Which dot and cross diagram correctly depicts a molecule of ammonia (NH3)?

    <p>The 3 circles are overlapping with the black dots in the center where the circles overlap.</p> Signup and view all the answers

    What is the most suitable process to separate a mixture of coloured compounds?

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

    Which substance contains sulfate ions?

    <p>Al2(SO4)3</p> Signup and view all the answers

    Which process would not be effective in separating soluble salt from water?

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

    Which of the following amino acids is coded by the codon AUG?

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

    What are the stop codons in the genetic code?

    <p>UAA, UAG, UGA</p> Signup and view all the answers

    Which of the following codons codes for Glutamic acid?

    <p>GAA, GAG</p> Signup and view all the answers

    Which elements have been reported but are not fully authenticated?

    <p>Elements 112 - 116</p> Signup and view all the answers

    How many codons code for the amino acid Serine?

    <p>6</p> Signup and view all the answers

    What is the atomic symbol for the element with atomic number 26?

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

    Which cation produces a lilac flame in the flame test?

    <p>K+</p> Signup and view all the answers

    What happens when Fe2+ is added to sodium hydroxide?

    <p>Green ppt turns brown over time</p> Signup and view all the answers

    Which anion forms a yellow precipitate when tested with nitric acid and silver nitrate?

    <p>I1-</p> Signup and view all the answers

    What is the general trend in solubility for the ammonium ion (NH4+)?

    <p>Generally soluble</p> Signup and view all the answers

    Which cation produces a brick red color in the flame test?

    <p>Ca2+</p> Signup and view all the answers

    What is the effect of adding barium chloride to a solution containing SO42-?

    <p>White ppt</p> Signup and view all the answers

    Which cation does not cause any color change in the flame test?

    <p>NH4+</p> Signup and view all the answers

    When Al3+ reacts with sodium hydroxide in excess, what is observed?

    <p>White ppt redissolves with XS</p> Signup and view all the answers

    What is the primary function of the mitochondria in a cell?

    <p>Energy production</p> Signup and view all the answers

    In a monohybrid cross, what is the expected phenotypic ratio of the offspring?

    <p>3:1</p> Signup and view all the answers

    What is the term for the process by which organisms better adapted to their environment tend to survive and produce more offspring?

    <p>Natural Selection</p> Signup and view all the answers

    Which element has the highest electronegativity?

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

    What type of reaction occurs when an acid reacts with a base to produce salt and water?

    <p>Neutralization Reaction</p> Signup and view all the answers

    What is the general formula for alkanes?

    <p>CnH2n+2</p> Signup and view all the answers

    What is the phase change that involves the transformation from solid directly to gas?

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

    Which system in the human body is responsible for transporting oxygen and nutrients to cells?

    <p>Circulatory System</p> Signup and view all the answers

    Kangaroos have 16 chromosomes in their skin cells.

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

    The nucleus contains only the information to produce a specific protein.

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

    In a pedigree diagram, individuals with a condition are represented by filled-in shapes.

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

    Sickle cell anemia is a genetic disorder caused by a dominant allele.

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

    Chromatography is used to separate a mixture of colored compounds.

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

    __________ is responsible for producing energy in the cell.

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

    In Mendelian genetics, the expected phenotypic ratio of a monohybrid cross between two heterozygous individuals (Tt x Tt) is __________.

    <p>3:1</p> Signup and view all the answers

    The primary pigment involved in photosynthesis is __________.

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

    The system in the human body responsible for transporting oxygen and nutrients to cells is the __________ system.

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

    The process by which organisms better adapted to their environment tend to survive and produce more offspring is called __________.

    <p>natural selection</p> Signup and view all the answers

    The formula of aluminum phosphate is __________.

    <p>AlPO4</p> Signup and view all the answers

    Study Notes

    Multiple Choice Practice Questions

    DNA and Genetics

    • 35% of DNA bases are Guanine (G).
    • If 35% of DNA bases are G, then the remaining 65% are divided between A, C, and T.
    • A change in the base sequence of DNA is a correct description of a gene mutation.
    • If a chromosome has 6125 pairs of bases and 2345 of the bases are G, then the number of bases that are T is 3780.

    Inheritance and Pangolins

    • The allele for yellow flowers is dominant to the allele for red flowers.
    • If two heterozygous yellow-flowered plants are crossed, 75% of the offspring will have yellow flowers and 25% will have red flowers.
    • Pangolins are mammals, and one species of pangolin has 40 chromosomes per body cell.
    • A sperm cell from this species of pangolin will have 20 chromosomes.

    Pedigree Diagrams and Sickle Cell Anaemia

    • A pedigree diagram shows the inheritance of a recessive condition.
    • In the pedigree diagram, P and Q are both heterozygous for the condition.
    • Q and R have different genotypes.
    • P and R have the same genotype.
    • Heterozygous individuals are more resistant to malaria.

    DNA Structure

    • The sequence of bases on one strand of DNA is ATTGGACGGT.
    • The sequence of bases on the opposite strand is TAACCTGCCA.

    Chromosomes and Fertilisation

    • Kangaroos have 16 chromosomes in their skin cells.
    • A kangaroo sperm cell has 8 chromosomes.
    • A gene contains only the information to produce a specific protein.
    • Fertilisation is the combining of male and female nuclei.

    Organization of the Human Body

    • The correct level of organisation, from simplest to most complex, is: red blood cell, heart muscle, heart, circulatory system.

    DNA, Chromosomes, and Fertilisation

    • The structure of DNA involves two strands coiled together to form a double helix.
    • The correct pairing of bases between the two strands is: A and T, C and G.

    Chromatogram and Compounds

    • A chromatogram shows the separation of substances based on their properties.
    • The pure substance with the largest R1 value is D.
    • Compounds are made up of two or more different elements chemically bonded together.
    • Compounds cannot be broken down into simpler substances by physical processes.
    • Compounds and their elements have different properties.

    Cryolite and In Vitro Fertilisation

    • Cryolite is a mineral that contains aluminium, sodium, and fluorine.
    • The formula of cryolite is Na3AlF6.
    • In vitro fertilisation (IVF) is available to everyone.
    • IVF provides an opportunity for single parents to have a family.
    • Sperm or egg donation may be involved in IVF.

    Atoms and Molecules

    • W, X, Y, and Z are diagrams representing atoms and molecules.
    • W, Y, and Z are molecules, and X is an atom.

    Sodium Phosphate, Aluminium Sulfate, and Aluminium Phosphate

    • Sodium phosphate, Na3PO4, contains sodium ions, Na+.
    • Aluminium sulfate, Al2(SO4)3, contains sulfate ions, SO42-.
    • The formula of aluminium phosphate is Al2(PO4)3.

    Water, Chalk, and Salt

    • A sample of water is contaminated with insoluble chalk and a soluble salt.
    • The two processes used to separate the water from the chalk and salt are filtration and crystallisation.

    Ammonia (NH3)

    • The dot and cross diagram that represents a molecule of ammonia (NH3) has one black dot in the center where the 3 circles overlap, and one black dot on the edge of the circle to the left of the overlapping center.

    Cell Structure and Function

    • Mitochondria is the organelle responsible for producing energy in the cell.

    Genetics

    • The expected phenotypic ratio of a monohybrid cross between two heterozygous individuals (Tt x Tt) is 3:1.

    Photosynthesis

    • Chlorophyll is the primary pigment involved in photosynthesis.

    Human Anatomy

    • The Circulatory System is responsible for transporting oxygen and nutrients to cells in the human body.

    Evolution

    • Natural Selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

    Periodic Table

    • Fluorine has the highest electronegativity among the elements.

    Chemical Reactions

    • A Neutralization Reaction occurs when an acid reacts with a base to produce salt and water.

    Stoichiometry

    • 2 moles of hydrogen gas react with 1 mole of oxygen gas to produce 2 moles of water.

    States of Matter

    • Sublimation is the phase change that involves the transformation from solid directly to gas.

    Organic Chemistry

    • The general formula for alkanes is CnH2n+2.

    Chromosomes and Cells

    • Kangaroos have 16 chromosomes in their skin cells.

    DNA Structure

    • The structure of DNA involves two strands coiled together to form a double helix.
    • The correct pairing of bases in DNA is A and T, and C and G.

    Genetics

    • A homozygous individual has two of the same alleles for a characteristic.
    • In a pedigree diagram, individuals with a condition are represented by filled-in shapes.
    • Sickle cell anemia is a genetic disorder caused by a recessive allele.

    Inheritance

    • In a monohybrid cross between two heterozygous individuals, the expected phenotypic ratio is 3:1.

    Lab Techniques

    • Chromatography is used to separate a mixture of colored compounds.

    Photosynthesis

    • The primary pigment involved in photosynthesis is not carotene.

    Cell Biology

    • Mitochondria are responsible for producing energy in the cell.

    Genetics

    • The expected phenotypic ratio of a monohybrid cross between two heterozygous individuals (Tt x Tt) is 3:3:3:1.

    Photosynthesis

    • The primary pigment involved in photosynthesis is chlorophyll.

    Human Body Systems

    • The circulatory system is responsible for transporting oxygen and nutrients to cells.

    Evolution

    • The process by which organisms better adapted to their environment tend to survive and produce more offspring is called natural selection.

    Chemistry

    • Fluorine has the highest electronegativity on the periodic table.

    Chemical Reactions

    • When an acid reacts with a base to produce salt and water, it undergoes a neutralization reaction.

    Chemistry Formulas

    • Cryolite, a mineral containing aluminum, sodium, and fluorine, has the chemical formula Na₃AlF₆.

    Chemical Compounds

    • Sodium phosphate, Na₃PO₄, contains sodium ions, Na+.
    • Aluminum sulfate, Al₂(SO₄)₃, contains sulfate ions, SO₄²⁻.
    • The formula of aluminum phosphate is AlPO₄.

    Laboratory Techniques

    • Chromatography is a process used to separate a mixture of colored compounds.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Practice your understanding of DNA, genetics, and inheritance concepts with these multiple-choice questions. Topics include DNA bases, gene mutations, and allele dominance.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser