MCQs4All - Biology Collection

Biology MCQs for NTS, FPSC, CSS, PPSC, PMS, UTS, FTS, OTS, Teaching, CT, PTC, SST, B.Ed, M.Ed of past papers

Question. All of the following are similarities between nervous and endocrine system except:_____________?
  1. Produce chemical messengers
  2. Release chemical messengers in extracellular space
  3. Homestatic in function
  4. Having slow but prolonged effects
Question. In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by__________________?
  1. Mitosis
  2. Meiosis
  3. Both depending upon the conditions
  4. None of these
Question. Un-separated replica of chromosome is called___________?
  1. Chromatin
  2. Kinetochore
  3. Chromatid
  4. Centromere
Question. The uptake of water in plants involves__________?
  1. Active transport
  2. Passive transport
  3. Both of these
  4. None of these
Question. Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap
  1. Increases.
  2. Lowers.
  3. Doesn’t effect.
  4. Maintains.
Question. Functional unit of DNA Is____________?
  1. Nucleus
  2. Genes
  3. Chromosomes
  4. Nucleolus
Question. Specific heat of vaporization of water is_______________?
  1. 574 Kcal/kg
  2. 674 Kcal/kg
  3. 774 Kcal/kg
  4. 874 Kcal/kg
Question. In Hardy-Weinberg formula P2 represents frequency of_____________?
  1. Recessive allele
  2. Dominant allele
  3. Homozygous dominant individual
  4. Homozygous recessive individual
Question. In Urea cycle __________ ammonia molecules combine with 1 CO2 molecule to form 1 molecule of urea.
  1. 1
  2. 2
  3. 3
  4. 4
Question. In man which organisms cause abscesses on the skin of arms or legs?
  1. Ascaris
  2. Bacteria
  3. Ring worm
  4. Suinea worm
Question. Magnesium is present in which of the following__________________?
  1. Cytochromes
  2. ATP
  3. Chlorophyll
  4. Haemoglobin
Question. If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?
  1. Open reduction.
  2. Closed Fixation.
  3. Open fixation.
  4. Immobilization
Question. The one that stores calcium is __________?
  1. Sarcolemma
  2. Sarcoplasm
  3. Sarcoplasmic reticulum
  4. Cytosol