Plasmodesmata
Cell walls
Vacuoles
Both ‘a’ & ‘b’
✅ The correct answer is option D.
Biology MCQs
In a hot summer afternoon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of
Positive feedback
Negative feedback
Feedback
Osmoregulation
✅ The correct answer is option B.
A chromosome is made of
2 chromatids +1 centromere +secondary constriction
1 chromatids + 1 centromere + primary constriction
2 chromatids + 1 centromere + primary constriction
2 chromatids + 2 centromere + secondary constriction
✅ The correct answer is option A.
In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.
Tonoplast
Apoplast
Symplast
Vacuolar
✅ The correct answer is option B.
In osmosis water molecules move from area of _______ to _______ through semipermeable membrane
Higher solute concentration to lower solute concentration
Lower solute concentration to higher solute concentration
Lower solvent concentration to higher solvent concentration
All of these
✅ The correct answer is option B.
Chromosomes are composed of
40% protein and 60% DNA
50% protein and 50% DNA
70% protein and 30% DNA
60% protein and 40% DNA
✅ The correct answer is option D.
Cytoplasmic strands that extend through pores in adjacent cell walls are known as
Pseudopods
Symplasts
Plasmodesmata
Pili
✅ The correct answer is option C.
Which of the following represents osmoregulatory steps taken by hydrophytes?
Increases transpiration by increasing the surface area of the leave.
Small and thick leaves to decrease the surface area proportional to the volume of the leave.
Stomata closing in a sufficient supply, and opening in a restricted supply of water.
None of these
✅ The correct answer is option A.
A typical human chromosome contains _________ nucleotides in its DNA
240 million
140 million
150 million
160 million
✅ The correct answer is option B.
In plants, water potential is determined by major factors.
Three
Four
Two
Five
✅ The correct answer is option C.