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Multiple Choice Questions Question. Which of the following is biodegradable waste ?(a) DDT (b) Aluminium can (c) Plastic bag (d) Cow dung Question. In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?(a) 6000 kJ (b) 20 kJ (c) […]

Multiple Choice Questions Question. Which of the following statements is incorrect?(a) Gene is a sequence of nucleotides(b) During the process of gene expression, DNA is first copied into RNA(c) Genes can acquire mutations in their sequence(d) Genes cannot acquire mutations in their sequence Question. The process where characteristics are transmitted from parent to offspring is called:(a) Variation(b) Heredity(c) Gene(d) Allele Question. In peas, a pure tall plant […]

Multiple Choice Questions Question. Which of the following methods of contraception protects from acquiring sexually transmitted diseases?(a) Surgery(b) Condoms(c) Copper T(d) Oral pills Question. The transfer of pollen from the anther to stigma is called………………….(a) Fusion(b) fertilization(c) Pollination(d) Vegetative propagation Question. The process of release of eggs from the ovary is called(a) Menstruation(b) Reproduction(c) Ovulation(d) Insemination Question. Which among the following diseases is not sexually transmitted?(a) Syphyllis(b) Hepatitis(c) HIV-AIDS(d) Gonorrhea Question. Factors responsible […]

Multiple Choice Questions Question. According to Mendeleev’s Periodic Law, the elements were arranged in the periodic table in the order of(a) increasing atomic number(b) decreasing atomic number(c) increasing atomic masses(d) decreasing atomic masses Question. Which of the following elements has 2 shells and both are completely filled?(a) Helium(b) Neon(c) Calcium(d) Boron Question. Which of the following are the characteristics […]

Multiple Choice Questions Question. Which of the following statements is incorrect regarding a homologous series?(i) Compounds in a homologous series can have the same or different functional group.(ii) Compounds in a homologous series have very less similarity in chemical properties.(iii) Difference between the two successive compounds in a homologous series differ by a CH2 group.(iv) Successive […]

Chapter 1 Chemical Reactions and Equations Chapter 2 Acids Bases Salts Chapter 3 Metals and Non-Metals Chapter 4 Carbon and Its Compound Chapter 5 Periodic Classification of Elements Chapter 6 Life Processes Chapter 7 Control and Coordination Chapter 8 How do the Organisms Reproduce Chapter 9 Heredity And Evolution Chapter 10 Light Reflection and Refraction […]

MULTIPLE CHOICE TYPE QUESTIONS Question. The substance produced by a cell in viral infection that can protect the other cells from further infection is:(a) Serotonin(b) Colostru(c) Interferon(d) Histamine Question. The antibodies present in colostrum which protect the new born from certain diseases is of:(a) IgG type(b) IgA type(c) IgD type(d) IgE type. Question. Which form […]

Very Short Answer Type Questions Question. Why are analogous structures, a result of convergent evolution ?Answer : Analogous structures are a result of convergent evolution because they are not anatomically similar structures though they perform similar functions. Detailed Answer :Analogous structures are said to be the result of convergent evolution because, though they perform a similar function […]

Very Short Answer Type Questions Question. Mention the contribution of genetic maps in human genome project. Answer : Sequencing of genes, DNA finger printing, tracing human history, chromosomal location for disease associated sequences. Question. Mention the role of the codons AUG and UGA during protein synthesis.Answer : AUG – codes for methionine / initiation codon.UGA – termination codon / stop codon.  Short […]