Get ready for the Junior Science Teacher (JST) test with solved Biology MCQs. Ideal for Sindh test prep through STS and ETEA with focused biology questions.
Biology (Cell Biology / Cell Division and Biology MCQs – Topic Wise) for the Junior Science Teacher (JST) notes. The correct answers are marked with bold, and I have ensured accuracy based on standard biological terminology and the context provided.
Cell Biology / Cell Division
Q.6 The entire cell wall of bacteria is often regarded as a single huge molecule or molecular complex called
(a) Capsule
(b) Slime capsule
(c) Secondary wall
(d) Sacculus
Q.7 Internal program of events and sequences of morphological changes by which cell commit a suicide is collectively called:
(a) Necrosis
(b) Metastasis
(c) Epistasis
(d) Apoptosis
Q.8 Phragmoplast is formed from vesicle which originates from:
(a) Smooth Endoplasmic Reticulum
(b) Ribosome
(c) Golgi Complex
(d) Rough Endoplasmic Reticulum
Q.9 A group of ribosomes attached to messenger RNA is known as:
(a) Ribosome
(b) Nucleosome
(c) Lysosome
(d) Polysome
Q.10 Detoxification of harmful drugs within the cell is done by:
(a) Nucleolus
(b) Ribosomes
(c) Smooth Surface Endoplasmic Reticulum
(d) Food Vacuoles
Q.11 During photorespiration, the glycolate is converted into glycine in a structure of cell called:
(a) Golgi Bodies
(b) Mitochondria
(c) Glyoxysome
(d) Peroxisome
Q.12 Which bond is the potential source of chemical energy for cellular activities?
(a) C-N
(b) C-H
(c) C-O
(d) H-O
Q.13 The soluble part of the cytoplasm is termed as
(a) Cisternae
(b) Endocytosis
(c) Cytosol
(d) Both A and B
Q.14 Which of the following modifies proteins and lipids by adding carbohydrates?
(a) Golgi Apparatus
(b) Plasma membrane
(c) Polysome
(d) None of these
Q.15 Which one of the following is most slender in structure?
(a) Microtubules
(b) Intermediate filaments
(c) Micro filaments
(d) Both A and B
Q.16 Which of the following are colorless?
(a) Chloroplasts
(b) Leucoplasts
(c) Chromoplasts
(d) None of these
Q.17 Prophase, metaphase and telophase are subdivisions of
(a) Mitosis
(b) Cytokinesis
(c) Karyokinesis
(d) None of these
Q.18 The two strands in DNA are coiled
(a) Parallel
(b) Both A, B
(c) to each other
(d) None of these
Q.19 When chromosomes uncoil, the nucleoli are reformed and two nuclei are the two poles of the cell; stage is known as
(a) Prophase
(b) Telophase
(c) Metaphase
(d) Anaphase
Q.20 Mental retardation, short stature, broad face and squint eyes are the symptoms of
(a) Down’s syndrome
(b) Turner’s syndrome
(c) Klinefelter’s syndrome
(d) XYZ syndrome
Q.21 Chiasmata formation takes place during which is known as
(a) Crossing Over
(b) Pairing
Biology MCQs – Topic Wise – Junior Science Teacher – JST
Introduction to Biology
Q.1 Which of the following is the lowest level of biological organization with respect to others?
(a) Multicellular organisms
(b) Species
(c) Biosphere
(d) Population
Q.2 At the cephalic end of primitive streak, closely packed cells form a local thickening known as:
(a) Henson’s Node
(b) Primitive Ridge
(c) Gastrocoele
(d) Primitive Gut
Q.3 In plants, the red light favours:
(a) Enhancement of cell differentiation
(b) Maturation of the cells
(c) Elongation of cells
(d) Enhancement of cell division
Q.4 Syphilis is caused by
(a) Neisseria gonorrhoeae
(b) Treponema pallidum
(c) Cats worm
(d) Herpes simplex
Q.5 Which of the following diseases can be prevented through vaccination?
(a) AIDS and Cancer
(b) Typhoid and Mumps
(c) Malaria and AIDS
(d) None of these
Q.6 Newly produced individuals which are identical in all respects are known as
(a) Genetically Modified
(b) Transgenic Bacteria
(c) Clones
(d) None of these
Q.7 Which of the following is a blood borne disease?
(a) Hepatitis
(b) Influenza
(c) Cholera
(d) Candidiasis
Q.8 The control of pest has traditionally meant regulation by natural enemies, predators, parasites and pathogens. This type of control is known as
(a) Cultural Control
(b) Pesticides Control
(c) Biological Control
(d) Insecticides Control
Q.9 Population of different species (plants and animals) living in the same habitat form a
(a) Community
(b) Ecosystem
(c) Microhabitat
(d) Biosphere
Q.10 The part of the body which forms a structural and functional unit and is composed of more than one tissue is called
(a) Organ
(b) Organ system
(c) Whole organism
(d) None of these
Q.11 A method in which pests are destroyed by using some living organisms or natural enemies is called
(a) Pasteurization
(b) Biological control
Cell Biology / Cell Division
Q.22 Healing of a wound and repair is the phenomenon which takes place by the process of
(a) Mitosis
(b) Meiosis
(c) Cell Growth
(d) Mitosis & Meiosis
Q.23 Which one of the following is the main cause of cancer?
(a) Mutation
(b) Regulated Mitosis
(c) Controlled Cell Division
(d) Haploid Division
Q.24 Which of the following organelles is concerned with the cell secretion
(a) Ribosomes
(b) Lysosomes
(c) Golgi Apparatus
(d) Mitochondria
Q.25 Which of the following contains peptidoglycan cell wall?
(a) Penicillium
(b) Adiantum
(c) Bacterium
(d) Polytrichum
Q.26 The inner membrane of mitochondria is folded to form finger like structure called
(a) Cristae
(b) Matrix
(c) Vesicle
(d) Cisternae
Q.27 Interior of chloroplast is divided into heterogeneous structure, embedded in the matrix known as
(a) Grana
(b) Thylakoids
(c) Stroma
(d) Cisternae
Q.28 In which phase of the cell division the metabolic activity of the nucleus is high?
(a) Mitosis
(b) Meiosis
(c) Interphase
(d) Cell Cycle
Q.29 Plastids are only found in the
(a) Animals and Plants
(b) Plants
(c) Animals
(d) Viruses
Q.30 Plasma membrane is chemically composed of
(a) Phospholipids only
(b) Lipids and carbohydrates
(c) Lipids and proteins
(d) Glycoproteins
Q.31 Endoplasmic reticulum contains a system of flattened membrane-bounded sacs which are named as
(a) Cristae
(b) Cisternae
(c) Marks
(d) Tubules
Q.32 Lipids synthesis / metabolism takes place in which of the following organelle?
(a) Mitochondria
(b) Rough endoplasmic reticulum
(c) Smooth endoplasmic reticulum
Q.33 Ribosomes exist in two forms, either attached with RER or freely dispersed in the
(a) Tonoplast
(b) Cytoplasm
(c) Golgi bodies
(d) SER
Q.34 Exchange of segments between homologous chromosomes is called
(a) Segregation
(b) Crossing over
(c) Independent assortment
(d) Mutation
Q.35 If a person has 44 autosomes + XXY, he will suffer from
(a) Klinefelter’s syndrome
(b) Turner’s syndrome
(c) Down’s syndrome
(d) Edward’s syndrome
Q.36 The ribosomal RNA is synthesized and stored in
(a) Endoplasmic reticulum
(b) Golgi complex
(c) Nucleolus
Q.37 In which stage of Interphase, there is increase in cell size and many biochemical are formed?
(a) G₁ phase
(b) S phase
Q.38 In Down’s syndrome, which one of the following pair of chromosome fails to segregate?
(a) 7
(b) 21
(c) 18
(d) 19
Q.39 The process by which unwanted structures within the cell are engulfed and digested within the lysosome is known as:
(a) Endocytosis
(b) Hydrolysis
(c) Exocytosis
(d) Autophagy
Q.40 The model of plasma membrane suggests that proteins are embedded in lipid bilayer:
(a) Unit membrane
(b) Permeable
(c) Fluid mosaic
(d) Ultracentrifuge
Q.41 The function of nucleolus is to make:
(a) rDNA
(b) rRNA
(c) Ribosomes
(d) DNA
Q.42 Lipid metabolism is the function of:
(a) Mitochondria
(b) SER
(c) Cytoplasm
(d) Chromosomes
Q.43 The enzymes of lysosomes are synthesized on:
(a) RER
(b) Chloroplast
(c) SER
(d) Golgi Apparatus
Q.44 Centrioles are made up of ___ microtubules:
(a) 9
(b) 3
(c) 27
(d) 12
Q.45 Which of the following structures is absent in higher plants and found in animal cells:
(a) Centriole
(b) Cytoskeleton
(c) Mitochondria
(d) None of these
Q.46 The soluble part of cytoplasm or fluid that remains when all organelles are removed is known as:
(a) Solution
(b) Cytoskeleton
(c) Gelatin material
(d) Cytosol
Q.47 The outer membrane of the nuclear envelope is at places continuous with the:
(a) Golgi apparatus
(b) Lysosomes
(c) Endoplasmic reticulum
(d) Peroxisomes
Q.48 Down’s syndrome is a result of non-disjunction of ___ pair of chromosomes that fails to segregate:
(a) 21
(b) 2
(c) 22
(d) 18
Q.49 During animal cell division, the spindle fibres are formed from
(a) Mitochondria
(b) Ribosomes
(c) Centrioles
(d) Lysosomes
Q.50 Which component of the cell is concerned with cell secretions?
(a) Plasma membrane
(b) Cytoskeleton
(c) Golgi complex
(d) Mitochondria
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