What is true regarding the chromosome shown in the diagram given below?

   

1. It is a metacentric chromosome with A called satellite and B called secondary constriction

2. It is a metacentric chromosome with B called satellite and A called secondary constriction

3. It is a submetacentric chromosome with A called satellite and B called secondary constriction

4. It is a submetacentric chromosome with B called satellite and A called secondary constriction

In the given diagram of chloroplast, enzymes required for the synthesis of carbohydrates and proteins are located in:

1. A

2. B

3. C

4. D

In the given diagram, what is true for both A and B?

1. They are involved in protein synthesis

2. They synthesize steroidal hormones in animal cells

3. They are a part of endomembranous system of a eukaryotic cell

4. They are continuous with the inner membrane of the nucleus

Match each item in Column I with one item in Column II and chose your answer from the codes given below.

Codes:

                I            II            III

1.             1            2             3 

2.             2            3             1

3.             2            1             3

4.             3            2             1

Which of the following structure is not found in a prokaryotic cell?

(1) Nuclear envelope

(2) Ribosome

(3) Mesosome

(4) Plasma membrane

Algae have cell wall made up of

1. cellulose, galactans and mannans

2. hemicellulose, pectins and proteins

3. pectins, cellulose and proteins

4. cellulose, hemicellulose and pectins

Pigment-containing membranous extensions in some cyanobacteria are

(1) heterocysts

(2) basal bodies

(3) pneumatophores

(4) chromatophores

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

(1) Bacillus

(2) Pseudomonas

(3) Mycoplasma

(4) Nostoc

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

(1) Lysosome

(2) Ribosome

(3) Chloroplast

(4) Mitochondrion

Select the mismatch.

1. Gas vacuoles — Green bacteria Cells

2. Large central vacuoles — Animal cells

3. Protists — Eukaryotes

4. Methanogens — Prokaryotes