Question with Answer Biology
1: Select the correct combination of the statements (A-D) regarding the characteristics of certain organisms.
A. Methanogens are Archaebacteria, wind produce methane in marshy areas.
B. Nostoc is a filamentous blue-green algae which fixes atmospheric nitrogen.
C. Chemosynthetic auto trophic bacteria synthesize cellulose from glucose.
D. Mycoplasma lack a cell wall and can survive without oxygen.
A: B, C
B: A, B, C
C: B, C, D
D: A, B, D
Correct Answer: D
2: Which one of the following is the correct description of a certain part of a normal human skeleton?
A: Parietal bone and the temporal bone of the skull are joined by fibrous joint
B: First vertebra is axis, which articulates with the occipital condyles
C: The 9th and 10th pairs of ribs are called the floating ribs
D: Glenoid cavity is a depression to which the thigh bone articulates
Correct Answer: A
3: Vegetative propagation in Pistia occurs by
A: stolen
B: offset
C: runner
D: sucker
Correct Answer: B
4: The 3’-5' phosphodiester linkages inside a polynucleotide chain serve to join
A: One DNA strand with the other DNA strand
B: One nucleoside with another nucleoside
C: One nucleotide with another nucleotide
D: One nitrogenous base with pentose sugar
Correct Answer: C
5: Identify the components labeled A, B, C in the diagram below from the list 1 to 8 given along with
1. Cristae of mitochondria
2. Inner membrance of mitochondria
3. Cytoplasm
4. Smooth endoplasmic reticulum
5. Rough endoplasmic reticulum
6. Mitochondrial matrix
7. Cell vacuole
8. nucleus
A: 5 4 8 3
B: 1 4 8 6
C: 6 5 4 7
D: 5 1 3 2
Correct Answer: A
6: Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.
A: The female parent is heterozygous
B: The parents could not have had a normal daughter for this character
C: The trait under study could not be colour blindness
D: The male parent is homozygous dominant
Correct Answer: A
7: Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statement is not correct during the process of nitrogen fixation?
A: Leghaemoglobin scavenges oxygen and is pinkish in colour
B: Nodules act as a site for nitrogen fixation
C: The enzyme nitrogenase catalysis the conversion of atmospheric N2 to NH3
D: Nitrogenase is insensitive to oxygen
Correct Answer: D
8: The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options (a-d), the components of reaction labeled as A, B, C and D are identified correctly?
A: Potential Transition Activation Activation energy state energy with energy enzyme without enzyme
B: Transition Potential Activation Activation energy energy energy energy without with enzyme enzyme
C: Potential Transition Activation Activation energy state energy with energy enzyme without enzyme
D: Activation Transition Activation Potential energy state energy energy with without enzyme enzyme
Correct Answer: B
9: Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D.
A: Nitrification Ammonification Animals Plants
B: Denitrification Ammonification Plants Animals
C: Nitrification Denitrification Animals Plants
D: Denitrification Nitrification Plants Animals
Correct Answer: B
10: Study the pathway given below In which the following options, correct words for all the three blanks A, B and C are indicated?
A: Decarboxylation Reduction Regeneration
B: Fixation Transamination Regeneration
C: Fixation Decarboxylation Regeneration
D: Carboxylation Decarboxylation Reduction
Correct Answer: C
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