0 votes, 0 avg 152 BEST OF LUCK Created by ANIL CHOUDHARYMOCK TEST 1CSIR NET LIFE SCIENCE FULL SYLLABUS 1 / 41In a large population, the frequency of a recessive disorder is 1 in 2500 births.Assuming HardyโWeinberg equilibrium, what percentage of the population are carriers of the disorder? 2% 4% 8% 10% 2 / 41Which enzyme is used in PCR? DNA polymerase I RNA polymerase Reverse transcriptase Taq polymerase 3 / 41Which cell junction prevents leakage? Desmosome Gap junction Adherens junction Tight junction 4 / 41Which process produces ATP without oxygen? Oxidative phosphorylation Glycolysis Photophosphorylation Krebs cycle 5 / 41Which hormone regulates blood glucose? Thyroxine Insulin Adrenaline Glucagon 6 / 41Which pyramid is always upright? Energy pyramid Biomass pyramid Number pyramid all 7 / 41Which DNA repair mechanism fixes thymine dimers? Mismatch repair Base excision repair Nucleotide excision repair SOS repair 8 / 41Which organelle is called suicide bag? Lysosome Ribosome Golgi ER 9 / 41Which enzyme breaks peptide bonds? Amylase Lipase Nuclease Protease 10 / 41Which type of selection favors extreme phenotypes? Stabilizing Directional Disruptive Balancing 11 / 41Which stage of meiosis shows crossing over? Leptotene Pachytene Zygotene Diplotene 12 / 41Which RNA carries amino acids? tRNA mRNA rRNA snRNA 13 / 41Which plant tissue provides mechanical support? Xylem Phloem Collenchyma Parenchyma 14 / 41Which blood cells lack nucleus? WBC RBC Platelets Lymphocytes 15 / 41Which gas is released during photorespiration? COโ Oโ Nโ Hโ 16 / 41Which bond stabilizes ฮฑ-helix? Peptide bond Peptide bond Disulfide bond Ionic bond 17 / 41Which organ is affected in jaundice? Kidney Liver Pancreas Spleen 18 / 41Which immune cells present antigen to T-cells? RBC Neutrophils Platelets APC 19 / 41Which of the following is NOT a C4 plant? Wheat Maize Sugarcane Sorghum 20 / 41Which protein forms spindle fibers? Actin Myosin Keratin Tubulin 21 / 41Hardy-Weinberg equilibrium assumes: Mutation Migration Random mating Natural selection 22 / 41Which mutation does NOT change amino acid sequence? Missense Nonsense Silent Frameshift 23 / 41Which enzyme catalyzes transcription? DNA polymerase RNA polymerase Reverse transcriptase Ligase 24 / 41Which vitamin deficiency causes scurvy? Vitamin A Vitamin B12 Vitamin C Vitamin D 25 / 41Which microscope gives highest resolution? Light microscope Phase contrast microscope SEM TEM 26 / 41Which cell cycle phase is longest? G1 S G2 M 27 / 41Which ecosystem has maximum primary productivity? Desert Grassland Tropical rainforest Tundra 28 / 41The genetic code is said to be degenerate because: One codon codes multiple amino acids Multiple codons code same amino acid Codons overlap Codons lack start signal 29 / 41Which gene regulates apoptosis? bcl-2 ras myc src 30 / 41Which blood group is universal donor? A B AB O 31 / 41Which statistical test is used to compare means of more than two groups? t-test Chi-square test ANOVA Correlation 32 / 41Which organelle is involved in photorespiration? Chloroplast only Mitochondria only Peroxisome only Chloroplast, mitochondria and peroxisome 33 / 41Which nitrogenous base is absent in RNA? Thymine Adenine Guanine Cytosine 34 / 41In SDS-PAGE, proteins are separated based on: Molecular weight Charge Shape Isoelectric point 35 / 41Which photosystem absorbs light of wavelength 700 nm? PSII PSI LHC Cytochrome b6f 36 / 41The operon that is normally ON but turned OFF in presence of corepressor is: Lac operon Trp operon Ara operon Gal operon 37 / 41Which of the following is a feature of Type I muscle fibers?A. Fast twitchB. Anaerobic metabolismC. High fatigue resistanceD. Low myoglobin a b c d 38 / 41Which immunoglobulin is present in maximum concentration in blood? IgA IgM IgG IgE 39 / 41Which plant hormone is responsible for bolting in rosette plants? Auxin Cytokinin Gibberellin Ethylene 40 / 41Which of the following enzymes removes RNA primers during DNA replication in prokaryotes? DNA polymerase I DNA polymerase III Primase Ligase 41 / 41A population follows logistic growth. At which point is the growth rate maximum? At carrying capacity (K) At N = K At N = K/2 At N = 0 Your score isThe average score is 63% 0% Restart quiz Share this: Share on X (Opens in new window) X More Share on Facebook (Opens in new window) Facebook Share on Telegram (Opens in new window) Telegram Share on WhatsApp (Opens in new window) WhatsApp Like this:Like LoadingโฆDiscover more from rashirozgar.comSubscribe to get the latest posts sent to your email. Type your emailโฆ Subscribe Post navigationSystem Physiology โ Plant
