Biology - Online Test
Q1. The first photo-autotroph organisms were
Answer : Option C
Explaination / Solution:
The first photo-autotroph organisms were bacteria. They are still present on earth in different form ranging from chemoautotrophs, autotrophs and heterotrophs.
Q2. A group of cells having a common origin and usually performinga common function is
Answer : Option C
Explaination / Solution:
A tissue is an ensemble of similar cells from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.
Q3. Measurement and the comparison of total growth per unit time is called
Answer : Option A
Explaination / Solution:
Absolute growth rate refers to the measurement and comparison of total growth per unit time.
Thus, Absolute growth = Growth in given time period.
Relative growth rate refers to the growth of a particular system per unit time, expressed on a common basis
Q4. International Code of Biological Nomenclature is applied to
Answer : Option A
Explaination / Solution:
Since biology deals with both plants and animals, the international code of biological nomenclature is applied to both plants and animals. Hence, the correct option is Both (2) and (3).
Q5. A meromyosin molecule doesn’t contain :
Answer : Option B
Explaination / Solution:
Each meromyosin has two important parts, a globular head with a short arm and a tail.
Q6. Cry genes can be transferred as they are present in a bacteria in
Answer : Option A
Explaination / Solution:
Cry gene is present in plasmid of bacterium. This gene can be easily separated from plasmid and included into another crops to provide resistance against pests and insects.
Q7. Fruit softening is promoted by polygalacturonase which degrades
Answer : Option C
Explaination / Solution:
Pectin present in cell wall of plant cell is responsible for hardness of fruit coat. Polygalacturonase is induced into the fruit that degrade the pectin and soften the fruit.
Q8. Action plans and programmes to attain total reproductive health called family planning were initiated in India in.
Answer : Option D
Explaination / Solution:
The first action plan to attain total reproductive health called family planning was initiated in 1951 in India after independence.
Q9. Select the correct equation from the following
Answer : Option C
Explaination / Solution:
Diffusion pressure deficit is equal to osmotic pressure minus water potential. Higher the DPD more faster osmosis will occur.(DPD = OP – WP).
Q10. The epithelium found in proximal convoluted tubule (PCT) of nephron in the kidney is
Answer : Option A
Explaination / Solution:
The cuboidal epithelium is composed of a single layer of cube-like cells found in ducts of glands and tubular parts of nephrons in kidneys and its main functions are secretion and absorption.
