Daily Biology Questions for NEET 2022
Q. ID – 20012021
Cytoskeleton is an elaborate network of filamentous proteinaceous structures present in the cytoplasm is not consisting of :
- Endoplasmic reticulum
- Microtubules
- Microfilaments
- Intermediate filaments
Answer : 1st Option
Explanation :
→ Endoplasmic reticulum is a network of tiny, tubular structures scattered in the cytoplasm. But Cytoskeleton is an elaborate network of filamentous, proteinaceous structures consists of Microtubules, Microfilaments & Intermediate filaments.
☆ NCERT 11, Page 136, Last para
Q. ID – 17012021
The exaggerated response of the immune system to certain antigens present in the environment is called :
- Allergy
- Auto immunity
- Graft rejection
- Dependence
Answer : 1st Option
Explanation :
→ Allergy is an exaggerated response of the immune system to certain antigens present in the environment.
→ When body attacks self-cells due to genetic or other unknown reasons, is called Auto immunity.
→ Graft rejection is a type of cell-mediated immune response for any transplant.
→ Dependence is the tendency of the body to manifest a characteristic withdrawal syndrome if regular dose of drugs is discontinued.
☆ NCERT 12, Page 153
Q. ID – 16012021
Select the correct statement from the following :
- In Amphibians endoskeleton is fully ossified & the long bones are hollow with air cavities.
- The skin of mammals is unique in possessing hair.
- Reptiles & Birds are warm blooded.
- All of the above
Answer : 2nd option
Explanation :
→ Fully ossified endoskeleton & hollow long bones with air cavities are found in birds.
→ Mammals skin is unique in possessing special type of hair.
→ Reptiles are cold blooded while birds are warm blooded.
☆ NCERT 11, Page 58 & 60
Q. ID – 15012021
Morula represents :
- Embryo with 2 to 4 blastomeres.
- Foetus with 4 to 8 blastomeres.
- Embryo with 8 to 16 blastomeres.
- Foetus with 16 to 32 blastomeres.
Answer : 3rd Option
Explanation :
→ Mitotic division starts in zygote and forms 2, 4, 8, 16 daughter cells gradually called blastomeres. The embryo with 8 to 16 blastomeres is called Morula.
☆ NCERT 12, Page 52 & 53
Q. ID – 14012021
Read the following statements carefully and choose the correct option.
- Inhibition of succinic dehydrogenase by malonate is an example of non-competitive inhibition.
- Prosthetic groups are inorganic compounds that are tightly bound to the apoenzyme.
- Co-enzymes are organic compounds, associate with the apoenzyme in only transient.
- Metal ions form hydrogen bonds with the side chains at the active site of apoenzyme.
Answer : 3rd Option
Explanation :
→ Inhibition of succinic dehydrogenase by malonate is an example of competitive inhibition.
→ Prosthetic groups are organic compounds. They are tightly bound to the apoenzyme.
→ Co-enzymes are organic compounds and their association with the apoenzyme is only transient, usually occurring during the course of catalysis.
→ metal ions form coordination bonds with side chains at the active site and at the same time form one or more cordination bonds with the substrate.
Q. ID – 13012021
Which of the following tissues are most abundant and widely distributed in the body of complex animals ?
- Epithelial tissue
- Connective tissue
- Muscular tissue
- Neural tissue
Answer : 2nd Option
Explanation :
→ Animal tissues are broadly classified into four types : Epithelial tissue, Connective tissue, Muscular tissue & Neural tissue.
→ Epithelial tissue basically covers the surface of any organs and organ systems.
→ Connective tissue link any tissue, organ, organ system & body part with another tissue, organ, organ system & body parts. It connect the all the body parts through Bones, Cartilages, Adipose (Fat), Blood & Fibres.
→ Muscular and Nural tissue are special type of tissues which are limited into specific body parts.
☆ NCERT 11, Page 102, Last para.
Q. ID – 12012021
Which of the following analogy is a result of convergent evolution ?
- Bones of fore limbs of Bat, Whale, Cheetah & Human
- Vertebrates hearts
- Thorn of Bougainvillea & Tendrils of Cucurbita
- Sweet potato & Potato
Answer : 4th Option
Explanation :
→ Analogous structure are a result of Convergent evolution.
→ Here “Bones of fore limbs of Bat, Whale, Cheetah & Human”, “Vertebrates hearts” and “Thorn of Bougainvillea & Tendrils of Cucurbita” are the example of Homologous structures. But “Sweet potato & Potato” is an example of Analogous structure.
☆ NCERT 12, Page 130 & 131
Q. ID – 11012021
Which of the followings is not correct about human circulatory system ?
- Human circulatory system is also called blood vascular system.
- Human circulatory system consists of a heart, a network of blood vessels and blood.
- Heart is the endodermally derived in origin.
- Human circulatory system is completely double, closed circulatory system in nature.
Answer : 3rd Option
Explanation :
→ Human circulatory system is also called the blood vascular system.
→ It consists of a muscular chambered heart, a network of closed branching blood vessels and blood, the fluid which is circulated.
→ Heart, the mesodermally derived organ, is situated in the thoracic cavity, in between the two lungs, slightly tilted to the left.
→ On the basis of the number of circulatory pathways, there are three types of circulation — single, incomplete double and complete double. Human have complete double circulation. On the basis of circulatory patterns, circulatory pathways are of two types — open or closed. Human circulatory system have closed circulatory pathways.
☆ NCERT 11, Page 282 & 283
Q. ID – 10012021
Long-term Ecosystem Experiments using outdoor plots was done by :
- Alexander von Humboldt
- David Tilman
- Paul Ehrlich
- Robert Constanza
Answer : 2nd option
Explanation :
→ German naturalist and geographer Alexander von Humboldt observed that within a region species richness increased with increasing explored area, but only up to a limit. He proposed Species-Area Relationships theory.
→ David Tilman’s Long-term Ecosystem Experiments using Outdoor Plots found that plots with more species showed less year-to-year variation in total biomass. In his experiments, he also showed that increased diversity contributed to higher productivity.
→Stanford Ecologist Paul Ehrlich gives “Rivet Proper Hypothesis” to understanding the importance of Species Diversity in Ecosystem.
→ Robert Constanza and his colleagues gave a price tags on nature’s life-support services.
☆ NCERT 12, Page 263, 1st para.
Q. ID -09012021
Which of the following external factor not affect Transpiration ?
- Light
- Oxygen concentration
- Humidity
- Wind speed
Answer : 2nd option
Explanation :
→ Transpiration is affected by several external factors : temperature, light, humidity, wind speed. Plant factors that affect transpiration include number and distribution of stomata, per cent of open stomata, water status of the plant, canopy structure etc.
→ Transpiration rate is indirectly affected by Carbon dioxide concentration, an increase in atmospheric carbon dioxide concentration means that no need to open stomata as much-needed. So, less water is lost and there is lower transpiration. But transpiration rate is unaffected by oxygen concentration.
☆ NCERT 11, Page 187