Doubtly
@Doubtly · Joined Feb 2021
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- Dobson units are used to measure thickness of : (1) Troposphere (2) CFCs (3) Stratosphere (4) Ozone ozone:: Dobson units are used to measure thickness of Ozone 2
- Which of the following characteristics is incorrect with respect to cockroach? (1) 10th abdominal segment in both sexes, bears a pair of anal cerci. (2) A ring of gastric caeca is present at the junction of midgut and hind gut. 1
- The centriole undergoes duplication during: (1) G2phase (2) S-phase (3) Prophase (4) Metaphase (2) S-phase is correct option 2
- Which one of the following is an example of Hormone releasing IUD ? (1) Multiload 375 (2) CuT (3) LNG 20 (4) Cu 7 3) LNG 20 is the correct option 2
- Match List - I with List - II. (a) Metamerism (i) Coelenterata Correct option: (3) (iii) (iv) (ii) (i) 2
- During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR (4) Denaturation is correct option 2
- Which one of the following belongs to the family muscidae? (1) House fly (2) Fire fly (3) Grasshopper (4) Cockroach (1) House fly is the correct option 2
- Which of the following statements wrongly represents the nature of smooth muscle? (1) These muscles are present in the wall of blood vessels (4) Communication among the cells is performed by intercalated discs 1
- In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be disease 4) 25% is correct option 2
- Read the following statements. (a) Metagenesis is observed in Helminths. (1) (b), (c) and (e) are correct 2
- The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are (2) pO₂ = 104 and pCO_(2 )= 40 2
- If adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it? (1) T : 20 ; G 25 : 25 ; C : 25 (4) T : 30 ; G : 20 ; C : 20 2
- Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature? (1) Pachytene (2) Leptotene (3) Zygotene (4) Diakinesis (4) Diakinesis is the correct option 2
- Match the following: (a) Physalia (i) Pearl oyster Correct option: (3) (ii) (iii) (iv) (i) 2
- Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli. (1) Low pO2, low pCO2, more H+ , higher temperature (2) High pO2, low pCO2, less H+ , lower temperature 2
- The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number (2) 8 is the correct answer 2
- Match List – I with List - II List I List-II (a) Aspergillus niger (i) Acetic Acid (b) Acetobacter aceti (ii) Lactic Acid (2) (iii) (i) (iv) (ii) correct answer is option (2) (iii) (i) (iv) (ii) 1
- Select the correct pair a) Cells of medullary rays that form part of combiai ring- interfascicular cambium a) Cells of medullary rays that form part of combiai ring- interfascicular cambium 1