Biology

Biology in Health - Human Health & Disease Biology in Health - Microbes in Human Welfare Biotechnology - Biotech Applications Biotechnology - Biotech Principles Cell Biology - Biomolecules Cell Biology - Cell Cycle & Division Cell Biology - Cell Structure Diversity in Living World - Animal Kingdom Diversity in Living World - Biological Classification Diversity in Living World - Plant Kingdom Diversity in Living World - The Living World Ecology - Biodiversity & Conservation Ecology - Ecosystem Ecology - Environmental Issues Ecology - Organisms & Populations Genetics & Evolution - Evolution Genetics & Evolution - Molecular Basis of Inheritance Genetics & Evolution - Principles of Inheritance Human Physiology - Body Fluids & Circulation Human Physiology - Breathing & Respiration Human Physiology - Chemical Coordination Human Physiology - Digestion & Absorption Human Physiology - Excretory Products Human Physiology - Locomotion & Movement Human Physiology - Neural Control Plant Physiology - Mineral Nutrition Plant Physiology - Photosynthesis Plant Physiology - Plant Growth & Development Plant Physiology - Respiration in Plants Plant Physiology - Transport in Plants Reproduction - Human Reproduction Reproduction - Reproduction in Organisms Reproduction - Reproductive Health Reproduction - Sexual Reproduction in Plants Structural Organization - Anatomy of Flowering Plants Structural Organization - Morphology of Flowering Plants Structural Organization - Structural Organisation in Animals
Q. What is the result of cytokinesis in animal cells? (2020)
  • A. Formation of a cell plate
  • B. Formation of two daughter cells
  • C. Replication of DNA
  • D. Separation of sister chromatids
Q. What is the role of Agrobacterium tumefaciens in biotechnology? (2021)
  • A. Gene delivery
  • B. Protein synthesis
  • C. Cell division
  • D. DNA replication
Q. What is the role of aldosterone in the body? (2021)
  • A. Increase blood glucose
  • B. Regulate sodium and potassium levels
  • C. Stimulate milk production
  • D. Enhance immune response
Q. What is the role of biopesticides in agriculture? (2021)
  • A. Increase soil fertility
  • B. Control pest populations
  • C. Enhance crop yield
  • D. Improve water retention
Q. What is the role of calcium ions in muscle contraction? (2022)
  • A. To provide energy
  • B. To bind to troponin
  • C. To stimulate nerve impulses
  • D. To form cross-bridges
Q. What is the role of chloroplasts in plant cells? (2021)
  • A. Respiration
  • B. Photosynthesis
  • C. Digestion
  • D. Reproduction
Q. What is the role of condoms in reproductive health? (2021)
  • A. To enhance pleasure
  • B. To prevent pregnancy and STIs
  • C. To increase fertility
  • D. To promote sexual activity
Q. What is the role of cyclins in the cell cycle? (2019)
  • A. To inhibit cell division
  • B. To promote apoptosis
  • C. To regulate the cell cycle
  • D. To repair DNA
Q. What is the role of DNA ligase in recombinant DNA technology? (2021)
  • A. To cut DNA
  • B. To join DNA fragments
  • C. To replicate DNA
  • D. To transcribe RNA
Q. What is the role of DNA polymerase? (2021)
  • A. Transcription
  • B. Replication
  • C. Translation
  • D. Repair
Q. What is the role of genetic drift in evolution? (1930)
  • A. It increases genetic variation
  • B. It leads to random changes in allele frequencies
  • C. It promotes adaptation to the environment
  • D. It is a form of natural selection
Q. What is the role of genetically modified organisms (GMOs) in agriculture? (2022)
  • A. Increase biodiversity
  • B. Reduce crop yield
  • C. Enhance resistance to pests
  • D. Decrease nutritional value
Q. What is the role of glucagon in the body? (2021)
  • A. Increase blood sugar levels
  • B. Decrease blood sugar levels
  • C. Stimulate growth
  • D. Regulate metabolism
Q. What is the role of hemoglobin in respiration? (2019)
  • A. Transporting oxygen
  • B. Filtering air
  • C. Regulating pH
  • D. Producing carbon dioxide
Q. What is the role of NADP+ in photosynthesis? (2021)
  • A. Energy storage
  • B. Electron carrier
  • C. Carbon source
  • D. Light absorber
Q. What is the role of neurotransmitters in neural communication? (2019)
  • A. To generate action potentials
  • B. To transmit signals across the synapse
  • C. To maintain resting membrane potential
  • D. To insulate the axon
Q. What is the role of neurotransmitters in the nervous system? (2019)
  • A. To transmit electrical impulses along the axon
  • B. To facilitate communication between neurons
  • C. To protect the neuron from pathogens
  • D. To store genetic information
Q. What is the role of oxygen in aerobic respiration? (2019)
  • A. To produce glucose
  • B. To act as an electron acceptor
  • C. To release energy
  • D. To absorb carbon dioxide
Q. What is the role of oxytocin in the human body? (2020)
  • A. Regulates metabolism
  • B. Stimulates uterine contractions
  • C. Increases blood sugar
  • D. Promotes water retention
Q. What is the role of plasmids in genetic engineering? (2019)
  • A. To provide energy
  • B. To serve as vectors for gene cloning
  • C. To synthesize proteins
  • D. To degrade DNA
Q. What is the role of platelets in the circulatory system? (2023)
  • A. Transporting oxygen
  • B. Clotting blood
  • C. Fighting infections
  • D. Transporting carbon dioxide
Q. What is the role of producers in an ecosystem? (2021)
  • A. They consume other organisms.
  • B. They decompose organic matter.
  • C. They convert solar energy into chemical energy.
  • D. They compete for resources.
Q. What is the role of RNA polymerase in transcription? (2021)
  • A. To synthesize DNA
  • B. To synthesize RNA
  • C. To unwind DNA
  • D. To splice RNA
Q. What is the role of sepals in a flower? (2022)
  • A. Attract pollinators
  • B. Protect the flower bud
  • C. Produce pollen
  • D. Support the ovary
Q. What is the role of sulfur in plants? (2023)
  • A. Protein synthesis
  • B. Photosynthesis
  • C. Water uptake
  • D. Cell division
Q. What is the role of tendons in the muscular system? (2023)
  • A. Connect muscles to bones
  • B. Connect bones to bones
  • C. Store energy
  • D. Facilitate blood flow
Q. What is the role of the cell membrane? (2021)
  • A. Energy production
  • B. Transport of substances
  • C. Protein synthesis
  • D. Photosynthesis
Q. What is the role of the filament in a flower? (2022)
  • A. To support the anther
  • B. To attract pollinators
  • C. To produce ovules
  • D. To receive pollen
Q. What is the role of the loop of Henle in the nephron? (2023)
  • A. Reabsorption of water
  • B. Secretion of urea
  • C. Filtration of blood
  • D. Regulation of pH
Q. What is the role of the lymphatic system in the human body? (2023)
  • A. Transporting oxygen
  • B. Removing waste products
  • C. Regulating blood pressure
  • D. Transporting lymph and immune cells
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