Cell: The Unit of Life

Pathogenic bacteria gain resistance to antibiotics due to changes in their :

1. Nucleoid
2. Cosmids
3. Plasmids
4. Nucleus

Which of the following is an incorrect statement?

1. Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm
2. Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles
3. Microbodies are present both in plant and animal cells
4. The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm

Match List-I with List-II. Choose the correct answer from the options given below.

1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
2. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
3. (a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
4. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :

1. Acrocentric
2. Metacentric
3. Telocentric
4. Sub-metacentric

The organelles that are included in the endomembrane system are

1. Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes
2. Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes
3. Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles
4. Golgi complex, Mitochondria, Ribosomes and Lysosomes

Which of the following statements about inclusion bodies is incorrect?

1. These are involved in ingestion of food particles
2. They lie free in the cytoplasm
3. These represent reserve material in cytoplasm
4. They are not bound by any membrane

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?

1. Peroxisomes
2. Golgi bodies
3. Polysomes
4. Endoplasmic reticulum

Which of the following pair of organelles does not contain DNA?

1. Lysosomes and Vacuoles
2. Nuclear envelope and Mitochondria
3. Mitochondria and Lysosomes
4. Chloroplast and Vacuoles

Which of the following statements regarding mitochondria is incorrect?

1. Inner membrane is convoluted with infoldings
2. Mitochondrial matrix contains single circular DNA molecule and ribosomes
3. Outer membrane is permeable to monomers of carbohydrates, fats and proteins
4. Enzymes of electron transport are embedded in outer membrane

Which of the following statements is not correct?

1. Lysosomes are membrane bound structures.
2. Lysosomes are formed by the process of packaging in the endoplasmic reticulum.
3. Lysosomes have numerous hydrolytic enzymes.
4. The hydrolytic enzymes of lysosomes are active under acidic pH.