wbjeeb.in Model Question Paper : WB JEEB West Bengal

Name of the Organisation : West Bengal Joint Entrance Examinations Board (wbjeeb.in)
Type of Announcement : Model Question Paper

Model Question Paper here : https://www.indianjobtalks.in/uploads/25775-model_question-bio_2014__25032014.pdf
Home Page : http://www.wbjeeb.in/

MODEL QUESTION PAPER (Biological Sciences)

Category I: Questions carrying one mark each (questions 1 to 22)
1. Plant cells are totipotent because
(A) they can survive under wide range of temperature
(B) they can be preserved under suitable condition
(C) they can be easily multiplied
(D)they can be regenerated to a mature plant
Ans. (D)
2. The ultimate source of energy for the biological processes is
(A) sunlight
(B) chemical bonds
(C) thermal radiation
(D) ATP
Ans. (A)
3. The senescence in plants is associated with the synthesis of
(A) IAA (B) NAA (c) ABA (D) GA
Ans. (C)
4. Hydrolytic enzymes are found in
(A) Peroxisome (B) glyoxysome (C) Lysosome (D) ribosome
Ans. (C)
5. Which of the following metals is associated with nitrogenese
(A) Zn (B) Cu (C) Mn (D) Mo
Ans. (D)
6. A C4 plant is photosynthetically more efficient than a C3 plant because of
(A) low photorespiration
(B) its ability to generate more ATP
(C ) thicker leaves
(D) its ability to trap more sunlight –
Ans. (A)
7. The protein molecule serves as an electron carrier is
(A)NAD
(B) FAD
(C ) Ferredoxin
(D) NADP
Ans. (C)
8. Cu is an essential component of
(A) cytochrome oxidase
(B) carbonic anhydrase
(c) peroxidose
(D) alcohol dehydrogenase
Ans. (A)
9. When the pollen tube enters the ovule through the micropyle is called is
(A) endogamy
(B) porogamy
(C) chalazogamy
(D) mesogamy
Ans. (B)
10. Which one is the modified stem
(A) potato
(B) corn
(C) spine of cactus
(D)Raddish
Ans. (A)
11. Largest amount of phosphate bond energy is produced in the process of respiration during
(A)Glycolysis
(B)Krebs cycle
(C) Fermentation
(D)Anaerobic respiration
Ans . (B)
12. Mendel crossed pure breed red flowered plants with pure breed white flowered plants and obtained all red flowered offspring (F1 generation). The gene for red flowers must have been
(A) Assorted
(B) Sex linked
(C) Dominant
(D)Carried on the same chromosome as the gene for white flowers
Ans: C
13. The parasite causing malaria in man was first discovered by
(A)Schwann
(B) Ronald Ross
(C) Landmarck
(D)Laveran
Ans : (D)
14. Haemoglobin remains dissolved in the plasma of
(A)Cockroach
(B) Lizards
(C) Porcupine
(D)Earthworm
Ans: (D)
15. The layers, from which gametes are formed, is
(A)Columnar epithelium
(B)Germinal epithelium
(C)Glandular epithelium
(D)Follicular epithelium
Ans : (B)
16. The following glands secrete saliva except
(A)Lachrymal gland
(B) Parotid gland
(C) Submaxillary gland
(D)Sublingual gland
Ans. (A)
17. Peritoneum in vertebrates is a membrane which invests
(A)Heart
(B) Blood platelets
(C)Alimentary canal and other visceral organ
(D)Lungs
Ans : (C)
18. The arterial pulse is due to
(A)Passage of ejected blood
(B)Quality of blood flowing in arteries
(C) The intermittent discharge of blood into the aorta
(D)The intermittent discharge of blood into the aorta and to the elasticity of the arteries.
Ans : (D)
19. The main function of the white blood corpuseles in the body is
(A)To protect the body against diseases
(B) To carry oxygen to each parts of body
(C) To carry food to each parts of body
(D)To help in the formation of clot.
Ans: (A)
20.‘Grasserie’ disease of silkworm is caused by
(A)Bacteria
(B) Fungus
(C) Protozoa
(D)Virus
Ans: (D)
21. Regulation of body temperature in a homeotherm, when the environmental temperature is high, would involve.
(A)Dilatation of the blood vessels of the skin
(B)Constriction of the blood vessels of the skin
(C)Decreased flow of blood without any change in blood vessels
(D) No change in the above blood vessels
Ans : (A)
22. When man inhales air containing normal concentration of oxygen as well as carbon monoxide, he suffers from suffocation, because
(A)Carbon monoxide affects the diaphragm and intercostals muscles
(B)Carbon monoxide affects the nerves of the lungs
(C)Carbon monoxide reacts with oxygen which is thus removed from the air entering the lungs
(D)Haemoglobin combines with carbon monoxide instead of oxygen and the product cannot dissociate.
Ans : (D)

Category II: Questions carrying two marks each (questions 23 to 34)
23.The phylum arthropoda is characterised by the presence of
(A) External segmentation, a pair of chalicerae and pedipalpi
(B)Exoskeletal scales, metamerism and a pair of antennae
(C)Chitinous exoskeleton, external segmentation and paired jointed appendages
(D) Hairs, external segmentation and metamerism
Ans : (C)
24. A student wants to know whether the oil used to kill mosquito larvae acts as a poison or whether it cuts off the oxygen supply to the larvae. Which of the following experiments would best answer his questions.
(A)Place larvae is an aquarium that contains nothing but oil.
(B)Place larvae in several aquariums that contain varying amounts of oil and water.
(C)Place larvae in an aquarium in which an obstruction prevents oil from completely covering the water.
(D) Place larvae in two aquariums, one without oil and the other with oil covering the water
Ans : (D)
25.Which of the following groups of characters of a whale justifies its inclusion in class Mammalian?
(A)It possesses heavy skin and mammary glands and produces young ones
(B)It possesses gills and fins and produces young ones
(C)It possesses vertebral column, lungs and 4-chambered heart
(D) It possesses lungs, 4-chambered heart and kidneys
Ans : (A)