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Welcome to your NEET WEEKLY TEST BIOLOGY (27.09.2025)
IMPORTANT INSTRUCTIONS
1. The test is of 90 minutes duration and Test Booklet contains 90 questions. Each question carried 4 marks for each correct response, the candidate will get 4 marks. For each incorrect response, one mark will be deducted from the total scores.2. Use of Cell phone/Electronics gadgets/Calculator etc. are not allowed.
BIOLOGY
1) lactose but not lactase2) lactase but not lactose3) lactobacillus but not lactose4) lactose as well as laevorotatory
2. Which enzyme/s will be produced in a cell in which there is a nonsense mutation in the lac Y gene?
1) Lactose permease2) Transacetylase3) Lactose permease and transacetylase.4) B-galactosidase
3. Which one of the following also acts as a catalyst in a bacterial cell?
1) sn RNA 2) hn RNA3) 23 S rRNA4) 5 S IRNA
4. The genetic code is:
1) Ambiguous and universal2) Degenerate and non-overlapping3) Commaless and universal4) Unambiguous and overlapping
5. PGA as the first CO2 fixation product was discovered in photosynthesis of
1) Bryophyte2) Alga3) Angiosperm4) Gymnosperm
1) Missense mutation2) Frameshift mutation3) Nonsense mutation4) Silent mutation
1) Nonsense mutation2) Missense mutation3) Silent mutation4) Frameshift mutation
1) DNA polymerase III2) DNA polymerase I3) Primase4) DNA ligase
1) Coding region of the gene2) Promoter region of the gene3) Terminator region of the gene4) Intronic region of the gene
1) Repressible operon2) Inducible operon3) Constitutive operon4) Overlapping operon
1) 3.1 × 10⁶ bp2) 3.1 × 10⁷ bp3) 3.1 × 10⁸ bp4) 3.1 × 10⁹ bp
1) mRNA (except T for U) 2) tRNA3) rRNA4) The template strand
1) 1980 2) 19903) 20004) 2010
1) 2,0002) 20,0003) 200,000 4) 2 million
1) 50%2) 25%3) 10% 4) 2%
1) Exons2) Introns3) Satellite DNA 4) Promoter regions
1) PCR amplification2) Gel electrophoresis3) Southern blotting4) Restriction digestion
1) Very high in siblings2) Almost zero, except for identical twins3) 50% in parent-child pairs4) 100% in unrelated individuals
1) DNA polymerase2) RNA polymerase3) Reverse transcriptase4) Ligase
1) RNA polymerase I2) RNA polymerase II3) RNA polymerase III4) All of the above
1) Sunflower2) Pea3) Lemon4) Mustard
1) Vexillary 2) Imbricate3) Twisted4) Valvate
1) pea2) Argemone3) Diathus 4) lemon
1) monadelphous 2) polyandrous3) diadelphous 4) polyadelphous.
1) vexillum2) corona3) carina 4) pappus.
1) Three2) Four3) Five 4) Six
1) Hilum2) Micropyle3) Nucellus 4) Chalaza
1) Scutellum 2) Coleoptile3) Aleurone4) Coleorhiza
1) endocarp2) receptacle3) mesocarp 4) epicarp
1) maize2) pea3) coconut4) castor.
1) Solanaceae2) Fabaceae3) Brassicaceae 4) Asteraceae.
1) Liliaccae 2) Solanaceae3) Asteraceae4) Fabaceae.
1) Corymb 2) Cyathium3) Capitulum4) Hypanthodium
1) Phyllotaxy2) Venation3) Vernation 4) Aestivation
41. Study the above floral formula and identify the family.
1) Disc florets of Asteraceae family2) Ray florets of Asteraceae family3) Disc florets of Gramineae family4) Ray florets of Gramineae family
1) marginal2) free central3) basal4) axile.
1) Flower is bisexual, actinomorphic and pentamerous2) Stigma equal to number of carpels3) Stamens are epipetalous4) Corolla arranged in imbricate aestivation.
1) Compositae2) Cruciferae3) Gramineae4) Solanaceae
1) More H+ and high temperature2) Less H+ and high temperature3) More H+ and low temperature4) Less H+ and low temperature
1) Emphysema2) Pneumonia3) Allergies4) Asthma
1) They carry 99.5% of O22) They transport 90% of O2, the rest 10% being transported by plasma in dissolved form3) They carry 20-25% of CO24) They do not carry CO2 at all
1) Less than that in the alveoli2) Less than of carbon dioxide3) Equal to that in the alveoli4) Less than that in the tissue
1) A, C and D2) A, D and E3) C, D and E 4) A, B and D
1) TV + IRV2) IRV + ERV3) IRV + ERV + TV4) ERV + RV
1) They bifurcate from the trachea2) They are divided into three parts – primary, secondary and tertiary bronchiole3) They are the last segment of the conducting system4) They penetrate the body cells
1) Both A and R are correct and R is the correct explanation of A2) Both A and R are correct but R is not the correct explanation of A3) A is true but R is false4) Both A and R are false
1) A-I, B-II, C-III, D-IV2) A-IV, B-III, C-I, D-II3) A-II, B-III, C-IV, D-I4) A-III, B-IV, C-I, D-II
1) Faster and deeper2) Slow and deep3) Shallower and slow4) No effect on breathing
1) (a) – Expiration, (b) – Inspiration2) (a) – Breathing, (b) – Respiration3) (a) – Inspiration, (b) – Expiration4) (a) – diaphragm relax, (b) – diaphragm contract
1) Squamous epithelium2) Podocytes3) Endothelium4) Connective tissue
1) Posterior-anterior2) Dorso-ventral3) Longitudinal4) Posterior-ventral
1) Total lung capacity2) Functional residual capacity3) Residual volume4) Vital capacity
1) HCO3– 2) H2CO33) CO2Hb 4) Free form
1) Endothelium of capillary2) Mucus layer3) Basement layer4) Epithelium
1) JD Watson2) Alfonso Corti3) Melvin Calvin4) GN Ramachandran
1) RBC count increases2) RBC count decreases3) Oxygen carrying capacity of haemoglobin increases4) Oxygen carrying capacity of haemoglobin decreases
1) I – II – III – IV – V2) III – IV – II – V – I3) II – V – I – III – IV4) IV – V – II – I – III
1) Inspiratory capacity2) Inspiratory reserve volume3) Expiratory capacity4) Expiration reserve volume
1) Bronchioles are damaged2) Alveolar walls are damaged3) The respiratory muscles are damaged4) The alveolar sacs are reduced in size
1) Meloidogyne incognita infects the root of cotton plants2) Strategy developed to attack nematode is RNA interference3) Translation of tRNA occurs in nematode4) Nematode specific antisense gene is introduced in cotton plants
1) Introduction of a functional ADA cDNA into lymphocytes2) Enzyme replacement therapy3) Introduction of gene isolated from bone marrow cells producing ADA into early embryonic cells4) Bone marrow transplant
1) Statement 1 is correct but statement 2 is incorrect2) Statement 1 is incorrect but statement 2 is correct3) Both statements are correct4) Both statements are incorrect
1) Is disarmed by deleting Ti gene and used as vector2) Isolated from Agrobacterium tumefaciens3) Can induce tumors in all types of plants4) Transfer T-DNA region to host plant
1) Eli Lily 2) Elixir3) Genetech4) Biocon
1) Production of interferons2) Production of insect resistant crops3) Production of recombinant vaccine4) Molecular diagnosis of disease
1) A, B and C2) B,C and D3) A only 4) D only
1) Both A and R are correct and R is the correct explanation of A2) Both A and R are correct and R is not the correct explanation of A3) A is correct but R is not correct4) A is not correct but R is correct
1) A,B,C,D2) A,B,C3) A,D4) B,C
1) Right to use invention2) Right to use biological entities3) Right to use products4) Right to use process
1) Both A and R are correct and R is the correct explanation of A2) Both A and R are correct but R is not the correct explanation of A3) A is correct but R is not correct4) A is not correct but R is correct
1) synthesis of cDNA and RNA using reverse transcriptase2) silencing of specific mRNA due to complementary RNA3) interference of RNA in synthesis of DNA4) synthesis of mRNA from DNA
1) Single polypeptide chains with 51 amino acids2) Consists of A,B and C chains3) Chains A and B are combined using disulfide bonds4) Prohormone is made up of C- peptide only
1) Vibrio cholerae2) Botulinum toxin3) Bacillus thuriengiensis4) Bacillis anthracis
1) Creating monopolies excluding innovators fron rightful share to markets2) Making decisions regarding validity of GM research and safety of introducing VM organisms3) Use of highly infectious pathogens as agent of biological weapons4) All of above
1) Alpha-1-antitrypsin2) Lactoferrin3) Tissue plasmogen activator4) Interleukin 2
1) Cotton bollworms only2) Cotton bollworms and corn borer respectively3) Corn borer and cotton bollworms respectively4) Corn borer only
1) Golden rice are golden in colour due to beta carotene2) Poplar trees clean up heavy metal pollution from contaminated water3) Potrykus and Beyer introduced two genes associated with synthesis of carotene in rice4) Poplar trees are used in phytoremediation
1) Ethical2) Low cost3) Cause temporary effect4) Deadly
1) A-b, B-d, C-a, D-c2) A-d, B-c, C-a, D-b3) A-c, B-a, C-d, D-b4) A-d, B-d, C-b, D-c