NEET UG
- Match List I with List II.List I (Type of Joint): A. Cartilaginous Joint; B. Ball and Socket Joint; C. Fibrous Joint; D. Saddle JointList II (Found between): I. Between flat skull bones; II. Between adjacent vertebrae in vertebral column; III. Betwee… Answer: 3. A-II, B-IV, C-I, D-III Key idea: Match each joint with its location. Cartilaginous joint: between adjacent vertebrae (II). Ball a... 1
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care Programme.Reason R: Ban on amniocente… Answer: 1. A is false but R is true. Key idea: Amniocentesis is misused to find the sex of the foetus, so it is banned for that purpose. Ass... 1
- Given below are two statements:Statement I: Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct.Statement II: The cavity of the cervix is called cervical canal which along with vagina forms birth canal.In… Answer: 2. Both Statement I and Statement II are true. Key idea: Check each statement against male and female reproductive anatomy. Statemen... 1
- Which of the following statements are correct regarding female reproductive cycle?A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.B. First menstrual cycle begins at puberty and is called menopause.C. Lack of me… Answer: 1. A, C and D only Key idea: Check each statement. A is correct: non-primate mammals show the oestrus cycle. B is wrong: the first m... 1
- Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly? Answer: 3. Gonorrhoea Key idea: Bacterial STDs can be cured with antibiotics, but viral STDs cannot. HIV, genital herpes and hepatitis-B are... 1
- Given below are two statements:Statement I: Ligaments are dense irregular tissue.Statement II: Cartilage is dense regular tissue.In the light of the above statements, choose the correct answer from the options given below: Answer: 3. Both Statement I and Statement II are false. Key idea: Check the type of tissue for each structure. Statement I is false: ligamen... 1
- Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by- Answer: 3. Ileo - caecal valve Key idea: The valve between the ileum and caecum prevents backflow. The ileo-caecal valve guards the opening... 1
- The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis? Answer: 3. Pachytene Key idea: Recombination nodules appear during pachytene, when crossing over takes place between non-sister chromatids o... 1
- Among eukaryotes, replication of DNA takes place in - Answer: 3. S phase Key idea: DNA replication in eukaryotes takes place in the S (synthesis) phase of interphase. G1 is for cell growth, G2 f... 1
- Match List I with List II :List I | List IIA. M Phase | I. Proteins are synthesizedB. G_2 Phase | II. Inactive phaseC. Quiescent stage | III. Interval between mitosis and initiation of DNA replicationD. G_1 Phase | IV. Equational divisionChoose the c… Answer: 4. A-IV, B-I, C-II, D-III Key idea: Match each phase with its feature. M phase: equational division (IV). G2 phase: proteins are syn... 1
- Movement and accumulation of ions across a membrane against their concentration gradient can be explained by Answer: 1. Active Transport Key idea: Movement of ions against their concentration gradient needs energy (ATP) and carrier proteins, and thi... 1
- Identify the pair of heterosporous pteridophytes among the following : Answer: 3. Selaginella and Salvinia Key idea: Heterosporous pteridophytes make two kinds of spores (micro and megaspores). Selaginella and S... 1
- Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :Assertion A : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.Reason R : Air currents carry the… Answer: 4. A is true but R is false. Key idea: In gymnosperms the pollen grains are carried by air currents, but they do form a pollen tube.... 1
- The historic Convention on Biological Diversity, 'The Earth Summit' was held in Rio de Janeiro in the year : Answer: 3. 1992 Key idea: The Earth Summit (Convention on Biological Diversity) was held at Rio de Janeiro in 1992. The 2002 summit was held... 1
- In the equationGPP - R = NPPGPP is Gross Primary ProductivityNPP is Net Primary ProductivityR here is ______. Answer: 4. Respiratory loss Key idea: Net primary productivity is the gross primary productivity left after plants use some for their own re... 1
- Identify the correct statements :A. Detrivores perform fragmentation.B. The humus is further degraded by some microbes during mineralization.C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.… Answer: 2. A, B, C only Key idea: Check each statement on decomposition. A is true: detritivores break detritus into smaller pieces (fragmen... 1
- The phenomenon of pleiotropism refers to Answer: 4. a single gene affecting multiple phenotypic expression. Key idea: Pleiotropy is the effect of a single gene on multiple phenotypi... 1
- Unequivocal proof that DNA is the genetic material was first proposed by Answer: 3. Alfred Hershey and Martha Chase Key idea: Hershey and Chase (1952) gave the unequivocal proof that DNA is the genetic material. T... 1
- In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as : Answer: 3. Dedifferentiation Key idea: When mature, differentiated cells (such as leaf mesophyll) go back to a meristematic state and divide... 1
- The reaction centre in PS II has an absorption maxima at Answer: 2. 680 nm Key idea: The reaction centre of PS II is P680, with absorption maximum at 680 nm. The reaction centre of PS I is P700 (70... 1
- Which of the following combinations is required for chemiosmosis? Answer: 2. membrane, proton pump, proton gradient, ATP synthase Key idea: Chemiosmosis needs a membrane, a proton pump, a proton gradient an... 1
- Match List I with List II :List I | List IIA. Iron | I. Synthesis of auxinB. Zinc | II. Component of nitrate reductaseC. Boron | III. Activator of catalaseD. Molybdenum | IV. Cell elongation and differentiationChoose the correct answer from the optio… Answer: 4. A-III, B-I, C-IV, D-II Key idea: Match each element with its role. Iron: activator of catalase (III). Zinc: needed for synthesis... 1
- Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production? Answer: 3. Gibberellic Acid Key idea: Spraying gibberellic acid (GA) on juvenile conifers hastens maturity, so they produce seeds early. ABA... 1
- Given below are two statements :Statement I : The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height.Statement II : Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling.In t… Answer: 2. Both Statement I and Statement II are correct. Key idea: Both statements are standard facts about transpiration. Statement I is c... 1