Kit Library / Science / Biology & Energy
⚡ Topic Learning KitShared by a Veda learner · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. The bites below come from this kit — swipe through them in the app.
One model explains all gene expression.
Francois Jacob and Jacques Monod (1961) proposed the operon model explaining how genes are regulated to produce proteins in bacterial cells.
↳ Gene expression flows from DNA to RNA to protein — the foundation of molecular biology.
Sugar breakdown starts outside the mitochondria.
↳ Glycolysis happens in the cytoplasm — not the mitochondria — making it the first step of respiration.
From fuel to electricity in four steps.
↳ Thermal power plants convert chemical energy → heat → mechanical → electrical energy.
Two factors make mold explode overnight.
↳ Abundant spores plus moisture and nutrients are the key drivers of rapid bread mold spread.
Bacteria that eat oil spills.
Pseudomonas bacteria are used in bioremediation to break down hydrocarbons and oil pollutants from soil and water.
↳ Pseudomonas is the go-to bacterium for cleaning oil pollutants — a real-world bioremediation application.
Don't confuse the starting material with the products.
↳ In odd-one-out questions, check whether the item is a reactant or a product — that distinction is the answer.
One word, one flower function.
↳ Carpel = female reproductive organ of the flower; the statement is True.
Snail or crab — know the phylum.
↳ Snail : Mollusca :: Crab : Arthropoda — match the phylum by body covering and locomotion.
One cell becomes four — with half the DNA.
↳ Meiosis is the process that forms four haploid cells from one diploid cell.
Two protists, two different strategies.
↳ Both reproduce by binary fission, but the plane of division differs — transverse in Paramoecium, longitudinal in Euglena.
Three reasons it's an arthropod.
↳ Cockroach belongs to Arthropoda — justified by jointed legs, exoskeleton, and segmented body.
One organism bridges two phyla.
Peripatus is considered a connecting link between Annelida and Arthropoda because it shares characteristics of both phyla.
↳ Peripatus shows annelid-like and arthropod-like features, making it an evolutionary bridge.
Why flowers matter for plant sex.
↳ The flower is the structural unit of sexual reproduction because it houses both male and female reproductive organs.
DNA from both parents decides.
New organisms are not genetically identical to the parent in sexual reproduction. The combination of genes from two parents determines whether offspring are exactly similar or not.
↳ In sexual reproduction, offspring similarity is determined by the gene combination from both parents — not by a single parent.
Save species in place or out of place.
↳ Biodiversity can be conserved through in-situ and ex-situ methods, backed by legal frameworks like the Wildlife Protection Act 1972.
Four features separate them.
↳ Chordates have a notochord, dorsal hollow nerve cord, gill slits, and post-anal tail — non-chordates lack all four.
One name links to mutation theory.
↳ Gregor Mendel : Modern genetics :: Hugo de Vries : Mutation theory.
Three bases, one amino acid.
↳ RNA synthesis : transcription :: Triplet codon : translation.
Define proteins in one line.
↳ Proteins are amino acid polymers that carry out structural and functional roles in the body.
Reproduce, compete, survive, evolve.
↳ Natural selection favors organisms with useful modifications, leading to new species over time.
India's legal shield for wildlife.
↳ The Wildlife Protection Act 1972 provides legal protection to wildlife and their habitats in India.
Soft body, hard shell, muscular foot.
↳ Molluscs are soft-bodied animals with a muscular foot and often a shell — key features for identification.
Five factors shape every ecosystem.
↳ Temperature, light, water, soil, and air are the key environmental factors that affect organisms and ecosystems.
Small DNA change, big effect.
↳ Mutations are changes in DNA sequence — identify the type by what part of the sequence is altered.
Three fuels, one energy currency.
↳ Carbohydrates, fats, and proteins all feed into cellular respiration to produce ATP — the cell's energy currency.
A rapid-fire review of the key concepts tested in the SSC Science & Technology II practice paper — covering genetics, cellular respiration, energy generation, microbial roles, and animal classification. Each bite targets…
Full explanation, worked examples & memory tricks in the app
All 21 questions, laddered from warm-up to topper-level, each with its answer and the reasoning behind it.
Q1. Jacob and Monad proposed a model for protein synthesis with the help of DNA in bacterial cells. Which sequence correctly represents the flow of information in this model?
BeginnerB · DNA → RNA → protein
The Jacob–Monod model states that DNA is transcribed into RNA, which is then translated into protein.
Q2. A student claims that glycolysis occurs in the mitochondria because that is where energy is produced. What is the correct location of glycolysis?
BeginnerD · Cytoplasm
Glycolysis takes place in the cytoplasm, where glucose is broken down to pyruvic acid.
Q3. In a thermal power plant, which component directly rotates the generator?
BeginnerD · Turbine
The turbine is coupled to the generator and its rotation drives the generator to produce electricity.
Q4. Which bacteria are useful for cleaning hydrocarbons and oil pollutants from soil and water?
BeginnerD · Pseudomonas
Pseudomonas bacteria can degrade hydrocarbons and are used in bioremediation of oil spills.
Q5. Which part of a flower is the female reproductive organ?
BeginnerA · Carpel
The carpel (or pistil) is the female reproductive part, containing the ovary with ovules.
Q6. Which process produces four haploid cells from one diploid cell?
BeginnerD · Meiosis
Meiosis is a reduction division that produces four haploid cells from one diploid cell.
Q7. Darwin's theory of natural selection states that:
BeginnerB · Organisms with favourable variations survive and reproduce
Natural selection favors organisms with variations that are advantageous in their environment, allowing them to survive and reproduce.
Q8. The Wildlife Protection Act 1972 was enacted mainly to:
BeginnerC · Protect wild animals, birds, and plants and prohibit hunting of scheduled species
The Act provides legal protection to wildlife and prohibits hunting of scheduled species, among other provisions.
Q9. Hugo de Vries is associated with which theory?
BeginnerD · Mutation theory
Hugo de Vries proposed the mutation theory of evolution.
Q10. Glycolysis occurs in the cytoplasm and breaks glucose into pyruvic acid.
BeginnerA · True
Glycolysis occurs in the cytoplasm and breaks glucose into pyruvic acid.
Q11. Bread mould spreads rapidly on a slice of bread. Which two factors are responsible for this rapid spread?
IntermediateA · Large number of spores and moisture/nutrients
The rapid spread is due to the large number of spores (many starting points) and the availability of moisture and nutrients in the bread.
Q12. Peripatus is considered a connecting link between Annelida and Arthropoda. Which feature supports its placement between these two phyla?
IntermediateB · It has annelid-like segmentation and arthropod-like jointed legs
Peripatus shows features of both annelids (segmentation, nephridia) and arthropods (jointed legs, tracheae), making it a connecting link.
Q13. A cockroach is placed in Phylum Arthropoda. Which set of features justifies this classification?
IntermediateB · Jointed appendages, chitinous exoskeleton, segmented body
Arthropods are characterized by jointed appendages, a chitinous exoskeleton, and a segmented body.
Q14. How does Paramoecium reproduce?
IntermediateD · By binary fission and conjugation
Paramoecium reproduces asexually by binary fission and sexually by conjugation.
Q15. Which of the following is a characteristic feature of chordates?
IntermediateA · Presence of a notochord
Chordates possess a notochord at some stage of life, along with a dorsal hollow nerve cord, pharyngeal gill slits, and a post-anal tail.
Q16. Which of the following is a characteristic of Phylum Mollusca?
IntermediateD · Soft body, muscular foot, and mantle
Molluscs typically have a soft body, a muscular foot for locomotion, and a mantle that may secrete a shell.
Q17. In a thermal power plant, if the fuel is coal, which of the following correctly represents the sequence of energy transformation from coal to electrical energy?
AdvancedA · Chemical energy (coal) → Heat energy (boiler) → Kinetic energy (turbine) → Mechanical energy (generator) → Electrical energy
The correct sequence is: chemical energy from coal is converted to heat energy in the boiler, which produces steam that drives the turbine (kinetic energy), which in turn rotates the generator to produce electrical energy.
Q18. A student is analyzing the flow of genetic information in a bacterial cell. If the student identifies the processes as follows: DNA → RNA → protein, which of the following statements correctly identifies the processes involved?
AdvancedA · DNA transcription → RNA synthesis → protein translation
The correct flow of genetic information involves DNA being transcribed into RNA (transcription), which is then translated into protein (translation). Thus, the processes are DNA transcription → RNA synthesis → protein translation.
Q19. Consider the following organisms: Paramoecium, Euglena, and a flowering plant. If you were to categorize their reproduction methods, which of the following pairings correctly identifies their reproductive strategies?
AdvancedD · Paramoecium: binary fission and conjugation; Euglena: binary fission; Flowering plant: sexual reproduction
Paramoecium reproduces through binary fission and conjugation, Euglena primarily reproduces by binary fission, and flowering plants reproduce sexually through the formation of seeds and fruits.
Q20. If a researcher is studying the characteristics of Phylum Mollusca, which of the following combinations correctly identifies three defining features of this phylum?
AdvancedD · Calcareous shell, muscular foot, mantle
Phylum Mollusca is characterized by a soft body usually covered by a calcareous shell, a muscular foot for locomotion, and a mantle that encloses the visceral mass.
Q21. In a study of evolutionary biology, a student is asked to explain why Peripatus is considered a connecting link between Annelida and Arthropoda. Which of the following explanations correctly identifies the features that justify this classification?
AdvancedA · Peripatus shows segmentation and has soft body with jointed appendages
Peripatus exhibits features of both Annelida (segmentation and soft body) and Arthropoda (jointed appendages), which is why it is considered a connecting link between these two phyla.
30 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
Word Match
Built from this kit's own content
True False
Built from this kit's own content
Memory Match
Built from this kit's own content
Flashcard Battle
Built from this kit's own content
Speed Quiz
Built from this kit's own content
Guess Term
Built from this kit's own content
Sequence Builder
Built from this kit's own content
Categorization
Built from this kit's own content
Revision Battle
Built from this kit's own content
Playable in the app
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.