In the given diagram of the green alga Chara, the parts labeled A and B respectively are called :
1. Nucule and Globule
2. Globule and Nucule
3. Antheridium and Archegonium
4. Archegonium and Antheridium
Though all four features shown in the diagram of a generalized chordate appear at some point during development, they are actually named for:
1. | A | 2. | B |
3. | C | 4. | D |
All living organisms are linked to one another because
1. They have common genetic material of the same type
2. They share common genetic material but to varying degrees
3. All have common cellular organization
4. All of the above
Consider the following statements:
I. Lion, leopard and tiger belong to same genus
II. Lion, leopard, tiger and cats belong to same family
III. Lion, leopard, tiger, cats and dogs belong to same order
This implies that:
1. Cats and dogs are more closely related to each other than cats and leopards
2. Lions share maximum characteristics with dogs
3. Lion, leopard and tiger are capable of interbreeding and producing fertile offspring
4. Lion, leopard, tiger, cats and dogs may belong to the same class in taxonomic hierarchy
The disease caused by prions in humans is known as:
1. Bovine spongiform encephalopathy
2. Scrapie
3. CJD [Creutzfeldt Jakob Disease]
4. Infectious mononucleosis
Which of the following is not a feature of the members of the class Basidiomycetes?
1. Branched and septate mycelium
2. Asexual spores are generally not formed
3. Vegetative reproduction not seen
4. Dikaryon stage commonly seen
Match the terms in Column I with their correct description in Column II and select the correct match from the codes given:
COLUMN I | COLUMN II | ||
A | Protonema | P | The first stage in development of the gametophyte in mosses. |
B. | Prothallus | Q | The photosynthetic gametophyte in ferns. |
C. | Seta | R | In bryophytes, the stalk that supports the capsule, if present. |
D. | Stipe | S | The stem-like part of the thallus of brown algae such as kelp |
A | B | C | D | |
1. | P | Q | R | S |
2. | Q | P | R | S |
3. | P | Q | S | R |
4. | Q | P | S | R |
COLUMN I | COLUMN II | ||
A | Spongilla | P | Sea-fan |
B | Euspongia | Q | Brain coral |
C | Gorgonia | R | Fresh Water sponge |
D | Meandrina | S | Sea-pen |
E | Pennatula | T | Bath sponge |
A | B | C | D | E | |
1. | T | R | P | Q | S |
2. | R | T | P | Q | S |
3. | T | R | Q | S | P |
4. | R | T | S | P | Q |
Identify the parts labeled as 1, 2 and 3 in prothallus of the fern:
A | B | C | |
1. | Archegonium | Antheridium | Multicellular rhizoids |
2. | Antheridium | Archegonium | Multicellular rhizoids |
3. | Archegonium | Antheridium | Unicellular rhizoids |
4. | Antheridium | Archegonium | Unicellular rhizoids |
Identify the incorrect statement regarding cyclostomes:
1. Lampreys have direct development, but Hagfishes go through a larval stage followed by metamorphosis into a juvenile form.
2. Unlike jawed vertebrates, which have three semicircular canals in each inner ear, lampreys have only two and hagfishes just one.
3. The hagfish blood is isotonic with seawater, while lampreys appear to use the same gill-based mechanisms of osmoregulation as marine teleosts.
4. Both hagfishes and lampreys have a single gonad.
With respect to fungal sexual cycle, choose the correct sequence of events
1. Karyogamy, Plasmogamy and Meiosis
2. Meiosis, Plasmogamy and Karyogamy
3. Plasmogamy, Karyogamy and Meiosis
4. Meiosis, Karyogamy and Plasmogamy
Identify the incorrect statement regarding true bacteria?
1. | As a group, they exhibit maximum metabolic diversity. |
2. | Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur. |
3. | Heterotrophic bacteria are the most abundant in nature. |
4. | Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores. |
Both stem tendrils and stem thorns:
1. help the plant to climb
2. develop from axillary buds
3. protect plants from browsing animals
4. can be used in vegetative propagation
I. | Leaves are modified into tendrils for climbing as in pea. |
II. | Leaves are modified into spines for defence as in cacti. |
III. | The leaves of onion and garlic store food. |
IV. | In Australian acacia, petioles expand, become green and synthesize food. |
V. | The trapping structure of venus fly trap and pitcher of pitcher plant are modified leaves. |
1. 2 | 2. 3 |
3. 4 | 4. 5 |
Statement I: | Alimentary canal is complete with a well-developed muscular pharynx. |
Statement II: | An excretory tube removes body wastes from the body cavity through the excretory pore. |
Statement III: | They are dioecious and males are longer than females. |
1. | Only Statement II |
2. | Only Statement III |
3. | Only Statement I and Statement II |
4. | Only Statement II and Statement III |
The given figure shows the architecture of the cell wall of:
1. Archaebacteria 2. Gram positive bacteria 3. Diatoms 4. Dinoflagellates |
Ovary is one chambered but it becomes two chambered due to the formation of a false septum in:
1. | Mustard and Argemone | 2. | Argemone and Dianthus |
3. | Mustard and Primrose | 4. | Argemone and Primrose |
Seed coat is membranous and generally fused with the fruit wall in:
1. | Apple | 2. | Maize |
3. | Coconut | 4. | Castor |
1. Only I and II | 2. Only I and III |
3. Only II and III | 4. I, II and III |
The hypodermis of a dicotyledonous stem:
1. is parenchymatous and synthesizes and stores food
2. is collenchymatous and provides mechanical strength to the young stem
3. is sclerenchymatous and provides mechanical strength to the young stem
4. is parenchymatous and provides mechanical strength to the young stem
In stems:
1. | the primary xylem is endarch with protoxylem towards the center and metaxylem towards the periphery |
2. | the primary xylem is endarch with metaxylem towards the center and protoxylem towards the periphery |
3. | the primary xylem is exarch with protoxylem towards the center and metaxylem towards the periphery |
4. | the primary xylem is exarch with metaxylem towards the center and protoxylem towards the periphery |
1. | near similar sizes of vascular bundles, including main veins, as seen in vertical sections of the leaves. |
2. | near similar sizes of vascular bundles, except in main veins, as seen in vertical sections of the leaves. |
3. | large sizes of vascular bundles in mid rib and smaller in veins, as seen in vertical sections of the leaves. |
4. | smaller sizes of vascular bundles in mid rib and larger in veins, as seen in vertical sections of the leaves. |
What are the structures labelled A, B, C and D respectively, in the given diagram?
1. | Mast cell, Fibroblast, Collagen, Macrophage |
2. | Mast cell, Dendritic cell, Collagen, Macrophage |
3. | Macrophage, Fibroblast, Elastin, Mast cell |
4. | Macrophage, Fibroblast, Collagen, Mast cell |
Reserve materials in prokaryotic cells are stored in the cytoplasm in the form of:
1. | Non-membrane bound lysosomes | 2. | Gas vacuoles |
3. | Chromatophores | 4. | Inclusion bodies |
Smooth muscles are:
1. Voluntary and striated
2. Voluntary and unstriated
3. Involuntary and unstraited
4. Involuntary and striated
Identify the incorrect statement regarding nucleolus:
1. | Their content is continuous with nucleoplasm |
2. | It is site for active rRNA synthesis |
3. | Their number is always one per nucleus |
4. | Larger nucleoli are present in cells actively carrying out protein synthesis |
Mesosomes, extensions of plasma membrane into the cell, help bacterium in all the following processes except:
1. | Photosynthesis in cyanobacteria | 2. | Respiration |
3. | DNA replication | 4. | Cell wall formation |
1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |
The double helix model of DNA by Watson and Crick exhibits its:
1. Primary structure | 2. Secondary structure |
3. Tertiary structure | 4. Quaternary structure |
Consider the given two statements:
I: | Palmitic acid has 16 carbons including the carboxyl carbon. |
II: | Arachidonic acid has 20 carbons including the carboxyl carbon. |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
I. | A | Sister chromatids |
II. | B | Q arm of the chromosome |
III. | C | Centromere |
IV. | D | P arm of the chromosome |
1. | Only I and II | 2. | Only II and IV |
3. | Only I and III | 4. | Only I |
Consider the given two statements:
Statement 1: A protein is a heteropolymer.
Statement 2: There are 20 types of proteinogenic amino acids and they are linked by peptide bonds to form polypeptides.
1. Only Statement 1 is correct
2. Only Statement 2 is correct
3. Both Statement 1 and Statement 2 are correct
4. Both Statement 1 and Statement 2 are incorrect
When we homogenize any tissues in an acid the acid soluble pool represents
1. | Cytoplasm | 2. | Cell membrane |
3. | Nucleus | 4. | Mitochondria |
In animal cells, steroidal hormones are synthesized in the:
1. | Rough endoplasmic reticulum |
2. | Smooth endoplasmic reticulum |
3. | Golgi apparatus |
4. | Lysosomes |
Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiples of C(H2O). Hexose therefore has six carbons, twelve hydrogen and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.
1. | Fructose | 2. | Erythrose |
3. | Ribulose | 4. | Ribose |
1. Only I | 2. II and III only |
3. I and IV only | 4. II and IV only |
All the following are significances of mitosis except:
1. Restoration of nuclear/cytoplasmic ratio
2. Growth of living organisms
3. Replacement of lost cells
4. Generation of genetic variation
Identify the incorrect statement regarding cytokinesis:
1. | Animal cells divide by cleavage furrow |
2. | Cell plate formation takes place during cytokinesis in plant cells |
3. | The cell wall formation in plant cells starts near the existing lateral walls and grows inwards |
4. | At cytokinesis, mitochondria and plastids are distributed between daughter cells |
The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition
The beginning of diplotene is recognized by:
I: | dissolution of the synaptonemal complex |
II: | the tendency of recombined homologues of bivalents to separate |
III: | tetrads becoming clearly visible |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II, and III |
Identify the stage of mitosis shown in the given diagram:
|
Consider the following key events:
I: | Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements. |
II: | Nucleolus, Golgi complex and ER reform. |
The stage of mitosis characterized by these key events is:
1. | Prophase | 2. | Metaphase |
3. | Anaphase | 4. | Telophase |
The substrate concentration at which the enzyme catalyzed reaction achieves ½ Vmax is its ____ value.
1. Km | 2. Kcat |
3. pKa | 4. Q10 |