Biology - Online Test
Q1. Which one is incorrect about Glycolysis?
Answer : Option A
Explaination / Solution:
Glycolysis is not a cyclic pathway and carbon dioxide gas is not released during this cycle. Oxygen is not required for Glycolysis process. Glycolysis occurs in cytoplasm of the cell.
Q2. Biogas is produced by
Answer : Option A
Explaination / Solution:
Biogas is mixture of gases like methane, hydrogen and oxygen. It is produced by anaerobic breakdown of biomass like animal dung, animal wastes etc. It is used as fuel in rural areas.
Q3. Which of the following is a wrong matched pair
Answer : Option B
Explaination / Solution:
Dystrophic lake have too low accumulation of dissolved nutrients to support abundant plant life so, they have very low productivity.
Q4. Apomixis means
Answer : Option D
Explaination / Solution:
Apomixis is modified form of reproduction in plants in which seeds are formed without fusion of gametes. The diploid cell of nucellus develops into an embryo giving a diploid seeds.
Q5. Phylloclade are
Answer : Option D
Explaination / Solution:
Phylloclade are green succulent stems of indefinite growth that perform thefunction of photosynthesis duet to presence of chlorophyll.
Q6. Karyokinesis is the
Answer : Option E
Explaination / Solution:
Cell division consists of karyokinesis and cytokinesis. During karyokinesis division of chromosomes takes place and during cytokinesis division of cytoplasm takes place. Ultimately the cell divides into two halves.
Q7. The first restriction endonuclease discovered was
Answer : Option C
Explaination / Solution:
The first restriction endonuclease discovered was Hind II. Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence of Hind II.
Q8.
In human excretory system :
i. kidneys and ureters are paired structures but urinary bladder is single.
ii. Kidneys are situated between the levels of last thoracic and third lumbar vertebra.
Answer : Option D
Explaination / Solution:
The excretory system in human consistsof a pair of kidneys, one pair of ureters, aurinary bladder and a urethra. Kidneys are reddish brown, bean shaped structures situated between the levels of last thoracic and third lumbarvertebra close to the dorsal inner wall of the abdominal cavity.
Q9. Which of the following bird will be called most successfully evolved?
Answer : Option A
Explaination / Solution:
An organism that lays 5 eggs, hatch the 5 eggs to reproduce 5 offspring can be considered as most evolved out of the other given condition. Least evolved organism lays more egg but produce only a few offspring.
Q10. Which is the function of companion cells?
Answer : Option A
Explaination / Solution:
companion cell: any of a number of specialized parenchymal cells adjacent to a sieve tube in the phloem of flowering plants, believed to regulate the flow of nutrients through the tube.
