Consider the two statements:
I. Platyhelminthes are restricted to environments where dehydration is unlikely.
II. They are dorso-ventrally flattened.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect
Column I [Phyllotaxy] |
Column II [Example] |
A. Alternate | P. Alstonia |
B. Opposite | Q. Calotropis and Guava |
C. Whorled | R. China rose, Mustard and Sunflower |
A | B | C | |
1. | P | Q | R |
2. | P | R | Q |
3. | R | Q | P |
4. | Q | P | R |
In numerical taxonomy:
I. computers are used and all the observable characters are taken into consideration.
II. hundreds of characters can be considered together and each character is given equal importance.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. both I and II are incorrect
Look at a sample of a Herbarium Sheet given in the diagram and select the correct statements regarding a herbarium:
I: Herbarium specimens are accompanied by a label that indicates the location where the plant was growing, the collector and the date collected.
II: Most herbaria utilize a standard system of organizing their specimens into herbarium cases.
1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |
The chief producers in the oceans are:
1. | Floating hydrophytes | 2. | Blue green algae |
3. | Desmids | 4. | Diatoms |
Consider the following two statements:
I. The spread of living pteridophytes is restricted to narrow geographical regions
II. They are the first terrestrial plants to possess vascular tissues
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
Both Archaebacteria and Eubacteria:
I. have a similar structure of cell wall
II. are members of Kingdom Monera
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Contagium vivum fluidum was proposed by
1. D. J. Ivanowsky | 2. M. W. Beijerinek |
3. Stanley | 4. Robert Hooke |
Pneumatophores are found in plants growing in:
1. Xeric conditions | 2. Swampy areas |
3. Hypersaline environments | 4. Permafrost conditions |
1. A sponge | 2. A Cnidarian |
3. A Ctenophore | 4. A flatworm |
Biological name | Common name | |
1. | Aptenodytes | Penguin |
2. | Pavo | Peacock |
3. | Struthio | Pigeon |
4. | Psittacula | Parrot |
Which of the following statements would be true for brown algae?
1. | Major pigments are chlorophyll a, c and fucoxanthin. |
2. | Food is stored as floridean starch. |
3. | Vegetative cells have wall made of cellulose, pectin and polysulphate esters. |
4. | Flagellar number and insertions are 2, equal and apical. |
1. | Sea Urchin | 2. | Sea lily |
3. | Brittle star | 4. | Brain coral |
Alternaria, Colletotrichum and Trichoderma belong to the class:
1. Phycomycetes | 2. Ascomycetes |
3. Basidiomycetes | 4. Deuteromycetes |
Female sex organs of gymnosperms are called:
1. | Archegonia | 2. | Female strobili |
3. | Megasporangium | 4. | Megasporophyll |
The saprophytic protists are:
1. Slime moulds | 2. Protozoans |
3. Desmids | 4. Dinoflagellates |
Which of the following is a defining characteristic of living organisms?
1. Growth | 2. Ability to make sound |
3. Reproduction | 4. Response to external stimuli |
In a dicot stem, the pericycle is present on the inner side of the endodermis and:
1. above the phloem, in form of semi-lunar patches of sclerenchyma
2. above the xylem, in form of semi-lunar patches of sclerenchyma
3. above the phloem, in form of semi-lunar patches of collenchyma
4. above the xylem, in form of semi-lunar patches of collenchyma
The placentation shown below will be seen in:
1. | Argemone | 2. | Dianthus |
3. | Tomato | 4. | Sunflower |
In the given diagram of structure of a monocotyledonous seed,
1. A represents the fused testa and tegmen
2. B secretes enzymes for hydrolysis of stored nutrients
3. C is the single cotyledon seen in the seed
4. D is the covering of the embryonic root
Gymnosperms lack:
I. vessels in their xylem
II. sieve tubes and companion cells
III. secondary growth
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II, and III
If we consider the average composition of cells the correct descending order of the components will be:
1. Proteins → Nucleic acids → Carbohydrates → Lipids
2. Proteins → Carbohydrates → Nucleic acids → Lipids
3. Lipids → Carbohydrates → Nucleic acids → Proteins
4. Carbohydrates → Proteins → Lipids → Nucleic acids
Cell is the fundamental structural and functional unit of all living organisms. This statement can be best justified by the fact that:
1. The cells contain nucleic acids that contain genetic information
2. A large number of organelles present in the cell perform various functions
3. Anything less than a complete structure of a cell does not ensure independent living
4. All multi-cellular organisms begin their life as a single celled zygote
The cell junctions in animal tissues that perform the function of cementing to keep neighbouring cells together are known as:
1. Tight junctions
2. Adhering junctions
3. Gap junctions
4. Desmosomes
Which of the following is not an aromatic amino acid?
1. Phenylalanine | 2. Threonine |
3. Tyrosine | 4. Tryptophan |
An important site of the formation of glycoproteins and glycolipids in a eukaryotic cell is the:
1. Rough endoplasmic reticulum
2. Smooth endoplasmic reticulum
3. Golgi apparatus
4. Lysosomes
Identify the incorrectly matched pair:
Type of epithelium | Location | |
1. | Simple squamous | Blood vessels and alveoli |
2. | Simple cuboidal non brush bordered epithelium | Proximal convoluted tubule |
3. | Columnar epithelium | Stomach and small intestine |
4. | Ciliated epithelium | Bronchioles and fallopian tubes |
Which of the following is absent in almost all plant cells?
1. | Plastid | 2. | Cell wall |
3. | A large central vacuole | 4. | Centriole |
The endo-membrane system of a eukaryotic cell includes:
1. | Lysosomes | 2. | Peroxisomes |
3. | Mitochondria | 4. | Chloroplasts |
Identify the correct statements regarding the structures shown in the given diagram.
I: A is the transverse section of the axoneme of a flagellum showing 9 + 2 arrangement of the microtubules.
II: B is the basal body that has an ultrastructure identical to centriole.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Given below is the structure of a lipid. The excess of this compound in human blood can lead to:
1. Alzheimer’s disease | 2. Phenylketonuria |
3. Atherosclerosis | 4. Rheumatoid arthritis |
Which of the following organelles in a eukaryotic cell can only be seen after staining with vital dye?
1. Mitochondria | 2. Chloroplasts |
3. Nucleus | 4. Endoplasmic reticulum |
1. | All except IV | 2. | Only I and II |
3. | I, II, III and IV | 4. | Only II, III and IV |
Anal cerci in Periplaneta americana:
1. are present in the 9th segment in both sexes
2. are present only in males
3. are present in the 10th segment in both sexes
4. are present only in females
Match the following columns with reference to cockroach and select the correct option :
Column I | Column II | ||
(a) | Grinding of the food particles | (i) | Hepatic caeca |
(b) | Secrete gastric juice | (ii) | 10th segment |
(c) | 10 pairs | (iii) | Proventriculus |
(d) | Anal cerci | (iv) | Spiracles |
(v) | Alary muscles |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (iv) | (iii) | (v) | (ii) |
3. | (i) | (iv) | (iii) | (ii) |
4. | (ii) | (iii) | (i) | (iv) |
A | B | C | D | |
1. | Reducing end | Non reducing end | α [1→4] linkage | α [1→6] linkage |
2. | Non reducing end | Reducing end | α [1→4] linkage | α [1→6] linkage |
3. | Reducing end | Non reducing end | α [1→6] linkage | α [1→4] linkage |
4. | Non reducing end | Reducing end | α [1→6] linkage | α [1→4] linkage |
Which of the following is not an example of a secondary metabolite produced in living organisms?
1. | Lecithin | 2. | Alkaloids |
3. | Flavonoids | 4. | Antibiotics |
1. Only I | 2. Only II |
3. Only III | 4. None |
Consider the following two statements regarding enzyme action:
I. Co-factors play a crucial role in the catalytic activity of the enzyme.
II. Catalytic activity is reduced when the co-factor is removed from the enzyme.
Of the above statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
The cell expected to go through the events of cell cycle in the least amount of time would be:
1. Epithelial cell in humans | 2. Neuron in humans |
3. Yeast cell | 4. Escherichia coli |
1. Only I and II | 2. Only I and III |
3. Only II and III | 4. I, II and III |
I | A-Interphase; B-G1 phase; C-S phase; D-G2 phase |
II | P-Prophase; Q- Anaphase; R-Metaphase; S- Diakinesis |
III | X-Karyokinesis; Y- Cytokinesis |
1. Only III | 2. Only I and III |
3. Only II | 4. I, II and III |
During meiosis, the bivalent chromosomes clearly appear as tetrads first at:
1. | Zygotene of Prophase I | 2. | Pachytene of Prophase I |
3. | Metaphase I | 4. | Anaphase I |
The centrosome duplicates during:
1. Early Prophase | 2. Late Prophase |
3. S phase | 4. G2 phase |
Identify the stage of mitosis shown in the given diagram:
1. Prophase | 2. Metaphase |
3. Anaphase | 4. Telophase |