-
- RNA
- Histones
- Calcium
- DNA
Biology MCQs
Which of the following promotes growth in plants?
-
- Calvin cycle
- Photorespiration
- Both of these
- All of these
In the root cells _____pathway becomes discontinuous in the endodermis due to the presence of casparian strip.
-
- Tonoplast
- Symplast
- Vacuolar
- Apoplast
In an annelids, the contraction of circular muscle results in_____.
-
- Thinning of body
- Lengthening of the body
- Shortening of the body
- Widening of body
Which of the following statement about the head of a chlorophyll molecule is incorrect?
-
- It is hydrophobic
- It is a porphyrin ring or tetrapyrrole ring structure
- It is flat, square and light absorbing
- Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen
Which of following system is segmentally arranged in annelids?
-
- Excretory system
- Criculatory system
- Digestive system
- Nervous system
New alleles can be introduced into a population’s gene pool by_____.
-
- Gene flow
- Natural selection
- Mutation
- Both a & c
The number of chromosomes in human cell is_____.
-
- 46
- 48
- 44
- 26
Which of the following is the empirical formula of chlorophyll b?
-
- C55H70O5N4Mg
- C55H72O6N4Mg
- C55H72O5N4Mg
- C55H70O6N4Mg
How many species of mushrooms are edible?
-
- 100
- 3000
- 200
- 4000