Biology (School & UG)

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Q. What is the significance of the 'sticky ends' in DNA cloning?
  • A. They prevent DNA degradation
  • B. They facilitate the ligation of DNA fragments
  • C. They enhance PCR efficiency
  • D. They stabilize RNA structures
Q. What is the significance of the 'sticky ends' in recombinant DNA technology?
  • A. They help in DNA replication
  • B. They facilitate the ligation of DNA fragments
  • C. They are used for PCR amplification
  • D. They stabilize the DNA structure
Q. What is the significance of the 'sticky ends' produced by some restriction enzymes?
  • A. They allow for easier ligation of DNA fragments
  • B. They prevent DNA degradation
  • C. They enhance PCR efficiency
  • D. They facilitate RNA transcription
Q. What is the significance of the 5' and 3' ends of a DNA strand?
  • A. They indicate the direction of replication
  • B. They determine the type of base pairs
  • C. They are sites for protein binding
  • D. They are involved in RNA splicing
Q. What is the significance of the 5' cap and poly-A tail in eukaryotic mRNA?
  • A. They are involved in DNA replication
  • B. They protect mRNA from degradation and assist in translation
  • C. They are sites for transcription initiation
  • D. They help in splicing introns
Q. What is the significance of the 5' cap and poly-A tail in mRNA?
  • A. They are involved in DNA replication
  • B. They protect mRNA from degradation and assist in translation
  • C. They are required for transcription initiation
  • D. They help in the splicing of introns
Q. What is the significance of the apical meristem in plants?
  • A. Root growth
  • B. Leaf development
  • C. Stem elongation
  • D. All of the above
Q. What is the significance of the Calvin cycle in photosynthesis?
  • A. It produces ATP
  • B. It generates oxygen
  • C. It synthesizes glucose
  • D. It captures light energy
Q. What is the significance of the Cambrian explosion in plant evolution?
  • A. It marked the first appearance of land plants.
  • B. It led to the dominance of gymnosperms.
  • C. It resulted in the extinction of many plant species.
  • D. It was a period of rapid diversification of life forms.
Q. What is the significance of the electron transport chain in photosynthesis?
  • A. Produces glucose
  • B. Generates ATP and NADPH
  • C. Fixes carbon dioxide
  • D. Releases oxygen
Q. What is the significance of the fossil record in understanding plant evolution?
  • A. It shows current plant diversity
  • B. It provides evidence of past plant forms and their adaptations
  • C. It predicts future plant evolution
  • D. It eliminates the need for genetic studies
Q. What is the significance of the Hardy-Weinberg principle in plant genetics?
  • A. It predicts allele frequencies in a population
  • B. It describes protein synthesis
  • C. It explains photosynthesis
  • D. It outlines plant taxonomy
Q. What is the significance of the Law of Segregation in plant genetics?
  • A. It explains how traits are inherited independently
  • B. It states that alleles segregate during gamete formation
  • C. It describes the dominance of certain traits
  • D. It outlines the process of photosynthesis
Q. What is the significance of the light-dependent reactions for the dark reactions?
  • A. They provide glucose
  • B. They produce ATP and NADPH
  • C. They release carbon dioxide
  • D. They absorb water
Q. What is the significance of the light-dependent reactions in photosynthesis?
  • A. They produce glucose directly
  • B. They generate ATP and NADPH for the Calvin cycle
  • C. They fix carbon dioxide
  • D. They release carbon dioxide
Q. What is the significance of the light-dependent reactions?
  • A. Produce glucose
  • B. Generate ATP and NADPH
  • C. Fix carbon dioxide
  • D. Release oxygen
Q. What is the significance of the light-harvesting complexes?
  • A. To synthesize glucose
  • B. To absorb and transfer light energy
  • C. To produce oxygen
  • D. To fix carbon dioxide
Q. What is the significance of the promoter region in a gene?
  • A. It codes for the protein
  • B. It is where RNA polymerase binds to initiate transcription
  • C. It terminates transcription
  • D. It is a coding sequence
Q. What is the significance of the promoter region in gene expression?
  • A. It is where RNA polymerase binds to initiate transcription
  • B. It codes for the protein product
  • C. It is involved in splicing of mRNA
  • D. It terminates transcription
Q. What is the significance of the proton gradient created during the light-dependent reactions?
  • A. Drives ATP synthesis
  • B. Fixes carbon
  • C. Produces glucose
  • D. Generates oxygen
Q. What is the significance of the pulmonary circulation?
  • A. It delivers oxygen to the body
  • B. It removes carbon dioxide from the body
  • C. It circulates blood between the heart and lungs
  • D. It regulates blood pressure
Q. What is the significance of the sinoatrial (SA) node in the heart?
  • A. It pumps blood to the lungs
  • B. It generates electrical impulses for heartbeats
  • C. It regulates blood pressure
  • D. It stores blood
Q. What is the significance of the start codon in mRNA?
  • A. It signals the end of translation
  • B. It initiates the process of translation
  • C. It is the site of transcription
  • D. It codes for a stop signal
Q. What is the significance of the Z-scheme in photosynthesis?
  • A. It describes the Calvin cycle
  • B. It illustrates electron transport
  • C. It shows light absorption
  • D. It explains water splitting
Q. What is the significance of using biopesticides derived from microbes?
  • A. They are more toxic than chemical pesticides
  • B. They can target specific pests without harming beneficial organisms
  • C. They are less effective than synthetic pesticides
  • D. They require more frequent application
Q. What is the significance of using Latin names in plant classification?
  • A. They are easier to remember
  • B. They avoid language barriers
  • C. They are more descriptive
  • D. They are shorter
Q. What is the significance of using microbes in bioremediation?
  • A. They increase soil fertility
  • B. They degrade environmental pollutants
  • C. They enhance plant growth
  • D. They produce biofuels
Q. What is the significance of using probiotics in agriculture?
  • A. They increase crop yield
  • B. They enhance soil pH
  • C. They promote weed growth
  • D. They reduce water retention
Q. What is the significance of using Trichoderma in agriculture?
  • A. It enhances photosynthesis
  • B. It acts as a biocontrol agent
  • C. It increases soil salinity
  • D. It promotes root growth
Q. What is the stroke volume of a healthy adult heart?
  • A. 70 mL
  • B. 50 mL
  • C. 100 mL
  • D. 30 mL
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