Rhabdom is a part of:
1. the compound eye of an arthropod
2. the protonepohridia of flatworms
3. the second stage larva of mollusks
4. water vascular system of echinoderms
The guts of cow and buffalo possess:
1. Chlorella spp.
2. Methanogens
3. Cyanobacteria
4. Fucus spp.
1. | Male frog – a copulatory pad on the first digit of the hind limb |
2. | Female cockroach – anal cerci |
3. | Male shark – claspers borne on pelvic fins |
4. | Female Ascaris – sharply curved posterior end |
Which one of the following pair of animals comprises 'jawless fishes'?
1. Lampreys and eels
2. Mackerals and rohu
3. Lampreys and hagfishes
4. Guppies and hagfishes
What would be true regarding reproduction by ‘zoospores’ in algae and fungi?
1. | While they are produced in sexual reproduction in algae, in fungi they are produced in asexual reproduction. |
2. | While they are produced in sexual reproduction in fungi, in algae they are produced in asexual reproduction. |
3. | They are flagellated and motile in algae and non-motile in fungi. |
4. | They are motile and produced in asexual reproduction in both algae and fungi. |
Match the following group of organisms with their respective distinctive characteristics and select the correct option:
Organisms |
Characteristics |
||
(a) |
Platyhelminthes |
(i) |
Cylindrical body with no segmentation |
(b) |
Echinoderms |
(ii) |
Warm blooded animals with direct development |
(c) |
Hemichordates |
(iii) |
Bilateral symmetry with incomplete digestive system |
(d) |
Aves |
(iv) |
Radial symmetry with indirect development |
Options: | (a) | (b) | (c) | (d) |
1. | (iii) | (iv) | (i) | (ii) |
2. | (ii) | (iii) | (iv) | (i) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (i) | (ii) | (iii) | (iv) |
Organisms that obtain energy by the oxidation of reduced inorganic compounds are called:
1. Photo autotrophs
2. Chemo autotrophs
3. Saprozoic
4. Coproheterotrophs
Which of the following statements are true for the phylum-Chordata?
(a) | In Urochordata, notochord extends from head to tail and is present throughout their life |
(b) | In Vertebrata, notochord is present during the embryonic period only |
(c) | Central nervous system is dorsal and hollow |
(d) | Chordata is divided into 3 sub-phyla : Hemichordata, Tunicata and Cephalochordata |
1. (c) and (a)
2. (a) and (b)
3. (b) and (c)
4. (d) and (c)
1. | Cycas | 2. | Equisetum |
3. | Psilotum | 4. | Pinus |
Chrysophytes, Euglenoids, Dinoflagellates and slime moulds are included in the kingdom:
1. Animalia
2. Monera
3. Protista
4. Fungi
Bacterial flagella are formed of
1. Amines
2. Proteins
3. Lipids
4. Carbohydrates
Chemotaxonomy is defined by the Merriam-Webster dictionary as ‘the method of biological classification based on similarities and dissimilarities in the structure of certain compounds among the organisms being classified’. There is an argument that proteins are more reliable of genetic relationships. Which of the following most strongly supports the argument?
1. | Almost all enzymes are proteins |
2. | Proteins in living organisms are more closely controlled by genes. |
3. | The primary structure of proteins is very easy to determine. |
4. | A ribozyme catalyses the formation of peptide bond leading to the formation of proteins. |
Phylogenetic system of classification is based on:
1. evolutionary relationships
2. morphological features
3. chemical constituents
4. floral characters
Which of the following taxonomic category is less general in characters as compared to the taxonomic category ‘Genus’?
1. | Species | 2. | Division |
3. | Class | 4. | Family |
1. Dryopteris
2. Salvinia
3. Adiantum
4. Equisetum
Select the correctly written complete scientific name of Mango which was first described by Carolus Linnaeus:
1. Mangifera Indica
2. Mangifera indica Car. Linn.
3. Mangifera indica Linn.
4. Mangifera indica
Lichens are a well-known combination of an alga and a fungus where the fungus has:
1. An epiphytic relationship with the alga
2. A parasitic relationship with the alga
3. A symbiotic relationship with the alga
4. A saprophytic relationship with the alga
An asymmetric flower is seen in:
1. Mustard
2. Pea
3. Cassia
4. Canna
Which one of the following is a xerophytic plant in which the stem is modified into a flat green and succulent structure:
1. Casuarina
2. Hydrilla
3. Acacia
4. Opuntia
Which one of the following categories of animals, is correctly described with no single exception in it?
1. | All bony fishes have four pairs of gills and an operculum on each side |
2. | All sponges are marine and have collared cells |
3. | All mammals are viviparous and possess a diaphragm for breathing |
4. | All reptiles possess scales, have a three-chambered heart, and are cold blood (poikilothermal) |
How many plants in the list given below have marginal placentation?
Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin
1. Five
2. Six
3. Three
4. Four
The floral diagram shown in the given figure can represent the flowers of:
1. Sun hemp
2. Mustard
3. Belladonna
4. Tulip
Ovary is half-inferior in the flowers of:
1. guava
2. plum
3. brinjal
4. cucumber
The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals:
(a) | (b) | ||
(c) | (d) |
1. (c) and (d) have a true coelom
2. (a) and (d) respire mainly through body wall
3. (b) and (c) show radial symmetry
4. (a) and (b) have cnidoblasts for self-defence
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:
1. Vexillary
2. Imbricate
3. Twisted
4. Valvate
A competitive inhibitor of succinic dehydrogenase is
1. malonate
2. oxaloacetate
3. α-ketoglutarate
4. malate
Choose the correctly matched pair:
1. Tendon-Specialized connective tissue
2. Adipose tissue-Dense connective tissue
3. Areolar tissue- Loose connective tissue
4. Cartilage- Loose connective tissue
Sinus venosus in the heart of a frog:
I: | joins the left atrium |
II: | pumps blood into the major arteries |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
The shorter and longer arms of submetacentric chromosome are referred to as:
1. m-arm and n-arm respectively
2. s-arm and l-arm respectively
3. p-arm and q-arm respectively
4. q-arm and p-arm respectively
The transverse section of a plant shows following anatomical features:
a. | Large number of scattered vascular bundles surrounded by bundle sheath. |
b. | Large conspicuous parenchymatous ground tissue. |
c. | Vascular bundles conjoint and closed. |
d. | Phloem parenchyma absent. |
Identify the category of plant and its part :
1. Monocotyledonous root
2. Dicotyledonous stem
3. Dicotyledonous root
4. Monocotyledonous stem
1. | Hypodermis | Sclerenchymatous |
2. | Endodermis | Starch sheath |
3. | Medullary rays | Parenchyma cells |
4. | Protoxylem | Endarch |
Which of the following pair of organelles does not contain DNA?
1. Nuclear envelope and Mitochondria
2. Mitochondria and Lysosomes
3. Chloroplast and Vacuoles
4. Lysosomes and vacuoles
The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is:
1. cuboidal
2. glandular
3. ciliated
4. squamous
Lenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration
1. | is membrane-bound and contains storage proteins and lipids |
2. | is membrane-bound and contains water and excretory substances |
3. | lacks membrane and contains air |
4. | lacks membrane and contains water and excretory substances |
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
1. Peroxisomes
2. Golgi bodies
3. Polysomes
4. Endoplasmic reticulum
The blood concentration of blood glucose in a normal healthy human ranges between:
1. 4.5 – 5.0 mM
2. 45 – 50 mM
3. 70 – 100 nM
4. 100 – 150 mM
1. | A - Adaxial epidermis | 2. | B - Phloem |
3. | C - Mesophyll | 4. | D - Abaxial epidermis |
Identify the incorrect statement regarding the blood vascular system of cockroach:
1. Blood vessels are poorly developed and open into hemocoel
2. The hemolymph is composed of colorless plasma and hemocytes
3. Heart lies along the mid-ventral line of thorax and abdomen
4. Blood from sinuses enter heart through ostia
Lignin is most likely to be found in the secondary walls of:
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Epidermis
The famous aphorism ‘omnis cellula-e cellula’ was added to the cell theory in 1855 by:
1. Matthias Schleiden
2. Theodor Schwann
3. Rudolph Virchow
4. Robert Brown
In a plant cell, calcium pectate, is the main constituent of:
1. Primary cell wall
2. Secondary cell wall
3. Middle lamella
4. Cell membrane
Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?
1. Diakinesis
2. Pachytene
3. Leptotene
4. Zygotene
Identify the incorrect statement regarding the catalytic cycle of an enzyme:
1. Substrate binds to an active site
2. The enzyme is induced fit onto the substrate
3. A new enzyme-product complex is formed
4. Enzyme releases the product and is used up in the reaction
Which of the following is not a significance of mitosis?
1. It restores the effective nuclear cytoplasmic ratio of the cell
2. The growth in multicellular organisms
3. It results in daughter cells genetically distinct from parent cell
4. Cell repair
Match each item in Column I with one in Column II and select the correct answer from the codes given:
|
Level of protein organization |
|
Feature/Characteristic |
A |
Primary structure |
P |
Hydrogen bonding |
B |
Secondary structure |
Q |
Absolutely essential for many biological activities |
C |
Tertiary structure |
R |
Covalent bond |
D |
Quaternary structure |
S |
Seen only in proteins with more than one polypeptide chains |
Codes
A |
B |
C |
D |
|
1 |
P |
R |
Q |
S |
2 |
R |
P |
Q |
S |
3 |
R |
P |
S |
Q |
4 |
P |
R |
S |
Q |
Cells that do not divide further exit the cell cycle from the:
1. G0 phase
2. G1 phase
3. S phase
4. G2 phase
During which stage of the mitotic division the following events take place:
I. Chromosome cluster at opposite poles and their identity is lost as discrete elements
II. Nucleolus, ER and Golgi reform
1. Early prophase
2. Late prophase
3. Anaphase
4. Telophase
Consider the given two statements:
I: | In competitive enzyme inhibition, the substrate and inhibitor cannot bind to the enzyme at the same time. |
II: | The inhibitor always has a much higher affinity for the active site than the normal substrate. |
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 |
Enzymes that catalyze the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds are:
1. Hydrolases
2. Lyases
3. Ligases
4. Transferases