In ∆abc, AB = AC and AP = AQ. prove that CP = BQ.
Given, AB=AC AP=AQ Thus, AB-AP = AC-AQ BP=CA In ΔBCP and ΔBCQ, BP = CQ ∠c=∠c [common] BC=BC [common] Therefore,... View Article
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How big is 2 acres?
2 Acres is equal to 87120 in square feet.
Assertion (A): Desert plants take CO2 at night. Reason (R): They avoid faster evaporation of transpirational water.
a) Both A and R are false. b) Both A and R are true, and R is the correct explanation... View Article
Assertion (A): The sugar-phosphate backbone of two chains in DNA double helix show anti-parallel polarity. Reason (R): The phosphodiester bonds in one strand go from a 3 carbon of one nucleotide to a 5 carbon of adjacent nucleotide, whereas those in complementary strand go vice versa.
a) Both A and R are false. b) Both A and R are true, and R is the correct explanation... View Article
Which of the following about cockroach mouth part is mismatched
a) Labium – Lower lip b) Hypopharynx – Tongue c) Labium – Upper lip d) Labrum – Upper lip Answer:... View Article
Usnic acid is an antibiotic obtained from which of the following
a) Bacteria b) Algae c) Fungi d) Lichens Answer: d) Lichens Explanation: Lichens are a symbiotic association of algae and... View Article
Nif gene occurs in which of the following
a) Penicillium b) Aspergillus c) Streptococcus d) Rhizobium Answer: d) Rhizobium Explanation: Nif includes a group of genes that play... View Article
The Poliovirus enters the human body through which of the following means
a) Tick bite b) Nose secretions and Saliva c) Contaminated food and water d) Mosquito bite Answer: c) Contaminated food... View Article
Sexual reproduction in fungus happens in which sequence
a) Karyogamy, Plasmogamy and Meiosis b) Plasmogamy, Karyogamy and Meiosis c) Meiosis, Plasmogamy and Karyogamy d) Meiosis, Karyogamy and Plasmogamy... View Article
According to Hugo de Vries, mutations ar
a) Random and directionless b) Random and directional c) Definite and directional d) Small and directionless Answer: a) Random and... View Article
According to CPCB (Central Pollution Control Board), which particulate size of an air pollutant is more harmful?
a) 5.2 to 2.5 b) 2.5 micrometres or less c) 1.5 micrometres or less d) Greater than 5.2 micrometres Answer:... View Article
Assertion (A): Arteries are thick-walled and elastic. Reason (R): Arteries carry oxygenated blood
a) Both A and R are false. b) Both A and R are true, and R is the correct explanation... View Article
Which of the following has only unidirectional flow?
a) Energy b) Carbon c) Sulphur d) Nitrogen Answer: a) Energy Explanation: The flow of energy is unidirectional in nature.... View Article
The vast majority of bacteria are
a) Photoautotrophs b) Chemoautotrophs c) Heterotrophs d) Chemotrophs Answer: c) Heterotrophs Explanation: Bacterias can be heterotrophs, autotrophs, symbionts or chemotrophs.... View Article
In which stage of cell division does the chromosome appear in V or I or J shape?
a) Metaphase b) Anaphase c) Prophase d) Telophase Answer: b) Anaphase Explanation: In the anaphase stage, the sister chromatids move... View Article
How far is each base pair from the next one in a double helix DNA?
a) 0.34nm b) 0.34mm c) 0.43nm d) 0.43mm Answer: a) 0.34nm Explanation: The base pairs are covalently held together to... View Article
The statement – ‘Deoxythymidine is a monomer nucleotide of DNA’ is
a) False b) True Answer: b) True Explanation: The deoxyribose sugar with along with a base (ATGC), forms nucleoside. A... View Article
What type of heart do hemichordates have?
a) Dorsal b) Ventral c) No heart d) Lateral heart Answer: a) Dorsal heart Explanation: Ventral means front side, and... View Article
Why is our body temperature maintained?
a) To avoid hyperthermia b) To avoid hypothermia c) Both A and B d) None of these Answer: c) Both... View Article
The image type formed in the eyes of a cockroach is?
a) Superposition b) Apposition c) Both A and B d) None of these Answer: a) Superposition Explanation: The compound eye... View Article
