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.

The shorter and longer arms of a submetacentric chromosome are referred to as:

1. q-arm and p-arm respectively
2. m-arm and n-arm respectively
3. s-arm and l-arm respectively
4. p-arm and q-arm respectively

The concept of " Omnis cellula-e cellula" regarding cell division was first proposed by :

1. Schleiden
2. Aristotle
3. Rudolf Virchow
4. Theodore Schwann

Which of the following is true for nucleolus?

1. It takes part in spindle formation
2. Larger nucleoli are present in dividing cells
3. It is a membrane-bound structure
4. It is a site for active ribosomal RNA synthesis

The Golgi complex participates in

1. activation of amino acid
2. fatty acid breakdown
3. formation of secretory vesicles
4. respiration in bacteria

Which of the following events does not occur in rough endoplasmic reticulum?

1. Cleavage of signal peptide
2. Phospholipid synthesis
3. Protein folding
4. Protein glycosylation

Select the incorrect match.

1. Allosomes – Sex chromosomes
2. Sub-metacentric chromosomes – L-shaped chromosomes
3. Lampbrush chromosomes – Diplotene bivalents
4. Polytene chromosomes – Oocytes of amphibians

Which of the following components provides sticky character to the bacterial cell?

1. Nuclear membrane
2. Plasma membrane
3. Glycocalyx
4. Cell wall

DNA replication in bacteria occurs

1. within nucleolus
2. prior to fission
3. just before transcription
4. during S phase

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

1. Ribosome
2. Mitochondrion
3. Chloroplast
4. Lysosome

Water soluble pigments found in plant cell vacuoles are

1. carotenoids
2. anthocyanins
3. xanthophylls
4. chlorophylls.

Mitochondria and chloroplast are- Which one of the following options is correct?

1. Both A and B are false
2. Both A and B are correct
3. B is true but A is false
4. A is true but B is false

Microtubules are the constituents of

1. Cilia, Flagella and Peroxisomes
2. Centrosome, Nucleosome and Centrioles
3. Spindle fibres, Centrioles and Cilia
4. Centrioles, spindle fibres and chromatin

Which one of the following cell organelles is enclosed by a single membrane?

1. Mitochondria
2. Chloroplasts
3. Lysosomes
4. Nuclei

Select the mismatch.

1. Large central vacuoles – Animal cells
2. Methanogens – Prokaryotes
3. Gas vacuoles – Green bacteria
4. Protists – Eukaryotes

Select the wrong statement-

1. Pili and fimbriae are mainly involved in motility of bacterial cells
2. Mycoplasma is a wall-less microorganism
3. Bacterial cell wall is made up of peptidoglycan
4. Cyanobacteria lack flagellated cells.

A cell organelle containing hydrolytic enzymes is

1. Ribosome
2. Mesosome
3. Lysosome
4. Microsome

The structures that help some bacteria to attach to rocks and/or host tissues are

1. mesosomes
2. holdfast
3. rhizoids
4. fimbriae.

Chromatophores take part in

1. movement
2. respiration
3. photosynthesis
4. growth.

Balbiani rings are sites of :

1. Polysaccharide synthesis
2. Lipid synthesis
3. RNA and protein synthesis
4. Nucleotide synthesis

Match the columns and identify the correct option.

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