0 votes, 0 avg 140 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 64% 0% Restart quiz Share this: Click to share on X (Opens in new window) X More Click to share on Facebook (Opens in new window) Facebook Click to share on Telegram (Opens in new window) Telegram Click to share on WhatsApp (Opens in new window) WhatsApp Like this:Like Loading...Discover more from rashirozgar.comSubscribe to get the latest posts sent to your email. Type your emailโฆ Subscribe Post navigationSystem Physiology โ Plant