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AIIMS Nursing (BSc) Entrance Biology - Botany Flashcards
65 question-and-answer cards covering Biology - Botany as it is examined in AIIMS Nursing (BSc) Entrance. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Biology - Botany deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
Which gaseous plant hormone promotes fruit ripening, senescence, and abscission?
Ethylene.
What is photoperiodism?
The response of plants to relative lengths of day and night (light/dark periods), affecting flowering; plants are classified as short-day, long-day, or day-neutral.
What is vernalization?
The promotion of flowering by exposure to low temperature for a certain period (cold treatment).
What are the parts of a typical anther and what is microsporogenesis?
A typical anther is dithecous and tetrasporangiate; microsporogenesis is the formation of haploid microspores (pollen) from diploid microspore mother cells via meiosis.
Describe the structure of a mature embryo sac in angiosperms (7-celled, 8-nucleate).
It has one egg apparatus (1 egg + 2 synergids), 3 antipodal cells, and 1 central cell with 2 polar nuclei = 7 cells, 8 nuclei.
What is apomixis?
The formation of seeds without fertilization (asexual reproduction mimicking sexual seed formation).
State Mendel's Law of Segregation.
The two alleles of a gene segregate (separate) from each other during gamete formation, so each gamete receives only one allele.
State Mendel's Law of Independent Assortment.
Alleles of different genes assort independently of one another during gamete formation (applies to genes on different chromosomes).
What is the phenotypic ratio of a dihybrid cross in the F2 generation?
9:3:3:1.
In Watson and Crick's DNA model, which bases pair together and by how many hydrogen bonds?
Adenine pairs with Thymine (2 hydrogen bonds); Guanine pairs with Cytosine (3 hydrogen bonds).
State Chargaff's rule for DNA base composition.
In double-stranded DNA, the amount of adenine equals thymine (A=T) and guanine equals cytosine (G=C); thus purines = pyrimidines.
What is the central dogma of molecular biology?
Genetic information flows from DNA → RNA (transcription) → Protein (translation).
What are the trophic levels in an ecosystem?
Producers (T1), primary consumers/herbivores (T2), secondary consumers/carnivores (T3), tertiary consumers (T4), and decomposers.
What is the 10 percent law of energy flow given by Lindeman?
Only about 10% of energy is transferred from one trophic level to the next; the rest is lost mainly as heat (metabolism).
Why is the pyramid of energy in an ecosystem always upright?
Because energy is lost at each successive trophic level (10% law), so available energy always decreases upward.
What is ecological succession, and distinguish primary from secondary succession?
Gradual, predictable change in species composition of an area over time. Primary succession starts on bare lifeless areas (no soil); secondary succession occurs where soil already exists after disturbance.
What are the levels of biodiversity?
Genetic diversity, species diversity, and ecological (ecosystem) diversity.
What is the difference between in-situ and ex-situ conservation?
In-situ: conservation in natural habitat (national parks, sanctuaries, biosphere reserves); ex-situ: conservation outside natural habitat (zoos, botanical gardens, seed banks).
Name the IUCN Red List category for a species at extremely high risk of extinction in the wild.
Critically Endangered (CR).
What is biotechnology and name its two core techniques.
The use of living organisms/their products for human benefit; core techniques are genetic engineering (recombinant DNA technology) and bioprocess engineering (maintaining sterile microbial/cell cultures).
What are restriction enzymes and why are they called 'molecular scissors'?
Endonucleases that cut DNA at specific recognition sequences; they cut DNA into fragments, hence 'molecular scissors'.
What is Bt cotton and how does it confer pest resistance?
Transgenic cotton carrying the cry gene from Bacillus thuringiensis; it produces Bt toxin (Cry protein) that kills bollworm pests.
What is RNA interference (RNAi) as used in pest-resistant plants?
A method of cellular defense that silences specific mRNA using complementary dsRNA; used in tobacco plants to protect against nematodes by silencing nematode genes.
What are Ti plasmids and their role in genetic engineering?
Tumour-inducing plasmids of Agrobacterium tumefaciens, used as cloning vectors to deliver desired genes into plant cells.
What this deck covers
The Biology - Botany deck follows the AIIMS Nursing (BSc) Entrance Biology - Botany syllabus — 4 chapters and 16 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 16.3 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 117 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Biology - Botany flashcards FAQ
How many Biology - Botany flashcards are in this AIIMS Nursing (BSc) Entrance deck?
65 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these AIIMS Nursing (BSc) Entrance flashcards free?
Yes. The preview here is free to read with no signup, and the full 65-card deck is free inside the Examius app.
What do the Biology - Botany cards cover?
They follow the AIIMS Nursing (BSc) Entrance Biology - Botany syllabus — 4 chapters and 16 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.