CBSE 11TH BIOLOGY - Online Test
Q1. Cellular genes which are known to take part in producing cancer are termed as
Answer : Option C
Explaination / Solution:
Cellular genes which are known to take part in producing cancer are called cellular oncogenes. Cancer is caused due to uncontrolled division of cells to produce tumor on body.
Q2. Pinus seeds cannot germinate without
Answer : Option C
Explaination / Solution:
The fungus provides minerals and water to the roots, inturn the roots provide sugars and N-containing compounds to themycorrhizae. Some plants have an obligate association with themycorrhizae.
Q3. Influx and efflux of H+ ions inside the cell change the
Answer : Option D
Explaination / Solution:
pH of a solution is depends upon hydrogen ions concentration. Influx and efflux of H+ ions inside the cell change the pH of solution present in soil.
Q4.
In elephant and walrus, projecting tusks are :
Answer : Option B
Explaination / Solution:
The projecting tusk of elephant and walrus are incisors and canines respectively. These teeth are not used for chewing food.
Q5. Part of brain that acts as relay centre to receive and transmit general sensations except smell :
Answer : Option C
Explaination / Solution:
Thalamus is the part of brain that acts as relay centre to receiveand transmit general sensations except smell. Thalamus is located in the forebrain superior to the midbrain.
Q6. Cycas is a gymnosperm as it has
Answer : Option C
Explaination / Solution:
The gymnosperms (gymnos : naked, sperma : seeds) are plants in which the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilisation. The seeds that develop post-fertilisation, are not covered, i.e., are naked. Since, Cycas has naked seeds, it belongs to gymnosperms.
Q7. The staining procedure is developed by
Answer : Option C
Explaination / Solution:
The staining procedure developed by Gram viz., those that take up the gram stain are gram positiveand the others that do not are called gram negative bacteria.
Q8. Each photosystem has all the pigments forming light harvesting system also called as
Answer : Option D
Explaination / Solution:
Each photosystem has all the pigments (except one molecule of chlorophyll a) forming a light harvesting system also called antennae. These pigments help to make photosynthesis more efficient by absorbing different wavelengths of light.
Q9. Which of the following is not correctly matched :
Answer : Option C
Explaination / Solution:
Respiration is a physiological process. Total lung capacity (TLC) includes vital capacity (VC) and residual volume. Cutaneous respiration is the breathing via skin.
Q10. The following slide is of Transverse section of thyroid gland and it shows [from left to right] :
Answer : Option C
Explaination / Solution:
Transverse section of thyroid gland shows mark (1) as follicular epithelium, mark (2) as colloid containingthyroglobuin and mark (3) as clear cells.
