Biology - Online Test
Q1. Plants with Zinc deficiency show reduced biosynthesis of
Answer : Option A
Explaination / Solution:
Plants with Zinc deficiency show reduced biosynthesis of Auxin. Auxin play most important role in growth and elongation of plants by cell division and cell differentiation.
Q2.
Match the following:
| Nutrient | Absorbable Forms |
| a) Carbohydrate | i) Amino acids |
| b) Nucleic acid | ii) Monosaccharides |
| c) Proteins | iii) Sugar and bases |
| d) Lipids | iv) Fatty acids and glycerol |
Answer : Option B
Explaination / Solution:
Carbohydrate are converted into monosaccharides, nucleic acid are converted into sugar and bases by nucleosidases, proteins are converted into amino acids by dipeptidases and lipids are converted into fatty acids and glycerol by lipases.
Q3. Antibodies in our body are complex
Answer : Option B
Explaination / Solution:
Antibodies in our body are present in the blood in form of glycoproteins. They produce antigens in response to foreign particles to provide immunity against the pathogen.
Q4. Vermis is a portion of :
Answer : Option B
Explaination / Solution:
Cerebral vermis is located in the medial, cortico-nuclear zone of the cerebellum. It is constricted between lobe of cerebellum.
Q5. An algae with ribbon shaped chloroplast
Answer : Option B
Explaination / Solution:
Spirogyra is an algae that have long thread like structure having ribbon shaped chloroplast. Spirogyra is found in stagnant water forming green layer around the surface called pond scum.
Q6. The rod shaped bacteria is called as
Answer : Option B
Explaination / Solution:
The shapes of bacteria are bacillus (rod like), coccus (spherical), vibrio (comma shaped) and spirillum (spiral).
Q7. DNA has equal number of adenine and thymine residues (A = T) and equal number of guanine and cytosine (G = C). These relationships are known as
Answer : Option A
Explaination / Solution:
Chargaff's rules states that DNA from any cell of all organisms should have a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.
Q8. Breakdown of detritus by microbial enzymes into simple forms is called
Answer : Option D
Explaination / Solution:
Catabolism is the metabolic process due to which mass of the organism reduces. Detritus release microbial enzymes that breakdown the dead or decaying organisms into simpler form.
Q9. Name the photosynthetic pigment which can be converted to Vitamin A?
Answer : Option D
Explaination / Solution:
The photosynthetic pigment Beta-carotenes can be converted to Vitamin A. carrot contain large quantity of carotenes that can be converted into vitamin A.
Q10. Which part of our respiratory system doesn’t need ciliated epithelium and thus have non-ciliated walls ?
Answer : Option D
Explaination / Solution:
Respiratory system does not need ciliated epithelium and thus have non-ciliated walls such as alveoli. Alveoli are the balloon like structure at which exchange of gases takes place.
