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. In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?
  1. Endodermis
  2. Mesophyll
  3. Chitin
  4. Epidermis
Question. Double fertilization occurs in_________?
  1. All plants
  2. All seed plants
  3. Gymnosperms
  4. Angiosperms
Question. Purines and pyrimidines are in equal ration in DNA. It was indicated by_______________?
  1. F.Miescher
  2. Chargaff
  3. Watson & Crick
  4. Harshay & Chase
Question. Animals obtain carbohydrates mainly from___________?
  1. Glucose
  2. Starch
  3. Sucrose
  4. Glycogen
Question. Excessive increase in temperature of medium causes the enzyme molecule to____________?
  1. Activate
  2. Unaffected
  3. Denatured
  4. None of these
Question. Of the following which one is not found in series proterostomia?
  1. Annelida
  2. Arthropoda
  3. Mollusea
  4. Echinodermata
Question. Deoxygenated blood first enters in _________ part in fishes?
  1. Sinus venosus
  2. Right atrium
  3. Left atrium
  4. Conus arteriosus
Question. The survival of an animal depends upon its ability to take some from its environment____________?
  1. Chemicals
  2. Hydrocarbons
  3. Organic molecules
  4. Inorganic molecules
Question. Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________?
  1. A specific organism can always be found in association with a given disease
  2. The organism can be isolated and grown in pure culture in the laboratories
  3. The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.
  4. It is possible to recover the organism in pure culture from the experimentally infected animals
Question. The membrane of vacuoles is known as__________?
  1. Vacuoloplast
  2. Tonoplast
  3. Tanoplast
  4. All of these
Question. Gaseous exchange through the skin is known as ______________ respiration?
  1. Cuticular
  2. Cutaneous
  3. Skin
  4. Pulmonary
Question. Ribose is an example of___________?
  1. Trioses
  2. Tetroses
  3. Pentose
  4. Hexose
Question. Example of bacteria requiring low concentration of oxygen is__________?
  1. Campylobactor
  2. spirocheta
  3. E-coli
  4. Pseudomonas