Biology (Mixed Test)
Comprehensive biology quiz covering diverse topics including genetics, botany, cell biology, microbiology, and biochemistry
Questions
Which kind of interaction is shown by sea anemone and hermit crab?
- Symbiosis
- Amensalism
- Commensalism
- Parasitism
What is the advantage of velamen to the epiphytic plants?
- Photosynthesis
- Water absorption
- Respiration
- Water storage
Which of the following types of adventitious root modifications is found in Ipomoea batatas (sweet potato)?
- Tuberous roots
- Fasciculated roots
- Nodulose roots
- Moniliform roots
To which of the following categories does methanogens belong?
- Archaebacteria
- Cyanobacteria
- Phototropic bacteria
- Putrefaction bacteria
Which of the following types of substrate brings about the removal of a functional group from a substrate?
- Ligases
- Lyases
- Transferases
- Isomerases
In which of the following phases of meiosis I does synapsis occur?
- Leptotene
- Zygotene
- Pachytene
- Diplotene
Which of the following openings is guarded by mitral valve?
- Right auriculoventricular opening
- Left auriculoventricular opening
- Opening of pulmonary artery
- Opening of aorta
To which of the following protein categories does haemoglobin belong?
- Fibrous protein
- Chromoprotein
- Phosphoprotein
- Nucleoprotein
Coupling and repulsion are the two aspects of a single phenomenon called
- crossing-over
- linkage
- synapsis
- terminalization
Which of the following types of mutation is a reversible mutation?
- Point mutation
- Back mutation
- Forward mutation
- Lethal mutation
Which of the following characters is unique to pteridophytes?
- Vascular phanerogam
- Naked seed-bearing plant
- Non vascular plant
- Vascular cryptogam
Which of the following algae suppresses the growth of mosquito development?
- Spirogyra
- Spirulina
- Chara
- Volvox
Which of the following types of organisms is included in the Kingdom Monera?
- All unicellular organisms
- All viruses
- All microscopic organisms
- All prokaryotes
What is the Mendalian genotypic ratio of a monohybrid cross?
- 2 : 1
- 3 : 1
- 1 : 2 : 1
- 9 : 3 : 3 : 1
Which of the following types of stipule modifications is present in Acacia?
- Stipular spine
- Tendrilar stipule
- Foliaceous stipule
- Ochreate stipule
Mechanical support, enzyme circulation and protein synthesis are the main functions of
- peroxisomes
- glyoxysomes
- dictyosomes
- endoplasmic reticulum
Which of the following techniques is concerned with the separation of small quantity of organic substances on the basis of their mobility?
- Autoradiography
- Electrophoresis
- Chromatography
- Ultra-centrifugation
Which of the following pairs of nitrogen bases consititues the purines of DNA?
- Uracil and guanine
- Adenine and guanine
- Adenine and cytosine
- Uracil and adenine
The dome shaped wall separating the sporangium from the sporangiophore in mucor is called
- column
- columella
- elaters
- peristomium
Which of the following is true about the entropy of a living system?
- It always increases.
- It always decreases.
- It keeps constant.
- It varies constantly.