The membrane of vacuole is called

1. plasma membrane

2. tonoplast

3. cytoplasm

4. tunicates

Which of  the following is true about mitochondria except

1. Semi-autonomous organelle

2. Compartmentalisation is present

3. Matrix contain 80s ribosomes

4. Both 1 and 2

Which of the following is  present in matrix of mitochondria

1. ribosomes

2. RNA

3. DNA

4. All of the above

The following are true about mitochondria except

1. easily visualised under microscope without staining

2. It’s number in the cell depends on the physiological activity of the cell

3. It is highly variable in their shape and size

4. Double membranous structure

Chromatin can be stained with

1. Basic dyes

2. neutral dyes

3. acidic dyes

4. Crystal violet

Which of the following is true about chromosome

1. nucleoprotein

2. 23 pairs in single human diploid cell

3. Contains primary constriction

4. All of these

On what basis chromosomes have been divided into four classes.

1. position of centromere

2. position of primary constriction

3. number of kinetochores

4. Both A and B

In human beings, the membrane of erythrocyte has

Find out the incorrect statement

The contractile vacuole