Biology Entrance Exam

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BCECE Previous Year Biology Questions and Answers

1. The site of glycolysis is
a) ribosomes
b) nucleus
c) mitochondria
d) cytoplasm

2. In respiration, the released energy forms
a) AMP
b) ADP
c) ATP
d)glucose

3. The number of bases found in RNA are
a) 4
b) 3
c) 2
d) 1

4. The pseudouridine loop is present in
a) DNA
b) mRNA
c) tRNA
d) rRNA


5. This is a structural polysaccharide
a) Starch
b) chitin
c) Amylase
d) Glycogen

6. 70S ribosomes have two units. These are

a) 50S +30S
b) 40S+30S
c) 50S+20S
d) 40s+60s

7. The outer face of the outer membrane of Gram negative bacteria contains
a) teichoic acid
b) peptidoglycans
c) mycoic acid
d) lipopolysaccharides

8. These impart rigidity of plasma membrane
a)phospholipids
b) proteins
c) sterols
d) carbohydrates

9. Which one of the following has least similar characters?
a) family
b) class
c) genus
d) species

10. Blue green algae belong to this kingdom
a) bacteria
b) euglena
c) mycoplasma
d) monera

Answers
1. d) cytoplasm
2. c) ATP
3. a) 4
4. c) tRNA
5. b) chitin
6. a) 50S +30S
7. d) lipopolysaccharides
8. c) sterols
9. d) species
10. d) monera
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MCQ on Plant Kingdom - Diversity in Living World

1. The sporophytic generation is represented by zygote only, in
a) Funaria
b) Selaginella
c) Pinus
d) Chlamydomonas

2. Pinus is a gymnosperm as it has
a) vascular tissue
b) naked ovules
c) vessels
d) All of these

3. There is no alternation of generation in E.coli of absence of
a) nucleus
b) chromosome
c) syngamy
d) reduction division

4. Apophysis is a part of
a) spore of the moss
b) lower part of the moss
c) lower part of the moss capsule
d) anther of the moss

5. Shape of microspores in Selaginella is
a) oval
b) boat shaped
c) tertrahedral
d)none of these

6. A clear alternation of generation is seen in
a) Bryophytes
b) Pteridophytes
c) Gymnosperms
d) Fungi

7. In Funaria the spores are dispersed by the rupture of
a) Operculum
b) Annulus
c) Peristome
d) Trabeculae

8. Asexual reproduction in Spirogyra
a) has not been recorded
b) takes place by zoospore formation
c) takes place by aplanospore formation
d) takes  place by hypnospore formation

9. The commonest method of reproduction in case of blue green algae, is by means of
a) gametes
b) separation
c) heterocycts
d) akinetes

10. Under exceptional circumstances the cell forming aplanospores forms mucilage mass enclosing and protecting numerous small uninucleated bodies. The stage is known a

a) Flagellate stage
b) Resting stage
c) Palmella stage
d) Gongrosira stage

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Answers
1. d) Chlamydomonas
2. b) naked ovules
3. d) reduction division
4. c) lower part of the moss capsule
5. c) tertrahedral
6. b) Pteridophytes
7. b) Annulus
8. c) takes place by aplanospore formation
9. d)akinetes
10.c) Palmella stage
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AIPMT Biology Previous Questions and Answers with explanations

11. Biological organisation starts with (AIPMT, 2007)
Levels of Organization
a) Atomic level
b) Submicroscopic molecular level
c) Cellular level
d) Organism level

12. Which one of the following is an amine hormone? (AIPMT, 2008)
a) Progesterone
b) Thyroxine
c) Oxypurin
d) Insulin

13. Select one of the following of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms (AIPMT, 2008)
a) Embryo development and apical meristem
b) Absence of resin duct and leaf venation
c) Presence of vessel elements and absence of archegonia
d) Perianth and two integuments

14. Thermococcus, Methanococcus and Methanobacterium exemplify (AIPMT, 2008) a) Bacteria that contain a cytoskeleton and ribosomes
b) Archaebacteria that contain protein homologous to eukaryotic core histones
c) Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
d) Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria

15. Which one of the following is heterosporous? (AIPMT, 2008) a) Equisetum
b) Dryopteris
c) Salvinia
d) Adiantum

16. In which one of the following male and female gametophytes do not have free living independent existence? (AIPMT, 2008)
a) Cedrus
b) Pteris
c) Funaria
d) Polytrichum

17. T.O. Diener discovered a (AIPMT, 2009)
a) free infectious DNA
b) infectious protein
c) bacteriophage
d) free infectious RNA

18. Monotreal Protocol aims at ? (AIPMT, 2009)
a) biodiversity conservation
b) control of water pollution
c) control of carbon dioxide emission
d) reduction of ozone depleting substances

19. Male and female gametophytes are independent and free living in ? (AIPMT, 2010)
a) mustard
b) castor
c) Pinus
d) sphagnum

20.Which one of the following is not used in organic farming ? (AIPMT, 2010)
a) Glomus
b) Oscillatoria
c) Snail
d) Earthworm
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Answers with Explanations
11. b) Submicroscopic molecular level (Levels of Organisation)
12. b) Thyroxine
13. c) Presence of vessel elements and absence of archegonia
14. c) Archaebacteria that lack any histones resembling those found in eukaryotes but
whose DNA is negatively supercoiled. 
15. c) Salvinia
16. a) Cedrus
17.d) free infectious RNA (Viriod)
18. d) reduction of ozone depleting substances
19. d) sphagnum
20.c) Snail
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AIPMT Biology Previous Questions and Answers

1. Barophilic prokaryotes (AIPMT 2005)
a) Readily grow and divide in sea water enriched in any soluble salt of barium
b) Grow slowly in highly alkaline frozen lakes at high altitudes
c) Occur in water containing high concentration of barium hydroxide
d) Grow and multiply in very deep marine sediments


2. For retting of jute the fermenting microbe used in
a) Streptococcus lactin

b) Methophilic bacteria
c) Heliobacter pylori
d) Butyric acid bacteria

3. Which of the following unicellular organisms has a macronucleus for trophic function and one or more micronuclei for reproduction?
Parameciuma) Euglena
b)
Paramecium
c) Trypanosoma
d) Amoeba

4. The catalytic efficiency of two different enzymes can be compared by
a) formation of product
b) The Km value
c) molecular size of the enzyme
d) the pH of optimum value


5. In contrast to annelids the platyhelminthes show
a) Absence of body cavity
b) Radial symmetry
c) Presence of pseudocoel
d) Bilateral symmetry


6. Photosynthetic active radiation (PAR) has the following range of wavelength
a) 340-450 nm
b) 400-700 nm

c) 450-950 nm
d) 500-600 nm

7. Three crops that contribute maximum to global food grain production are
a) wheat, rice and maize
b) wheat, rice and barley

c) Wheat, maize and sorghum
d) Rice, maize and sorghum

8. Secretin and cholescystokinin are digestive hormones. They are secreted in
a) Duodenum
b) illeum
c) Oesophagum
d) Pyloric stomach


9. AIDS is caused by HIV that principally infect
a) All lymphocytes
b) Activator B cells
c) Cytotoxic T cells
d) T4 lymphocytes


10. Identify the correctly matched pair
a) Kyoto Protocol-Climatic change

b) Ramsar convention -Ground water pollution
c) Monotreal Protocol - Global warming
d) Basal convention - Biodiversity conservation
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Answers
1. d) Grow and multiply in very deep marine sediments
2. d) Butyric acid bacteria
3. b) Paramecium
4. b) The Km value
5. a) Absence of body cavity
6. b) 400-700 nm
7. a) wheat, rice and maize

8. a) Duodenum
9. c) Cytotoxic T cells
10. a) Kyoto Protocol-Climatic change
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