How many of the following plants have axile placentation?
China rose, Petunia, Trifolium, Colchicum, Tomato, Indigofera, Lemon, Tobacco, Gloriosa, Lupin, Aloe |
1. 4
2. 5
3. 6
4. 8
Identify the correct statement regarding members of Phaeophyceae:
1. The main photosynthetic pigment is fucoxanthin and chlorophyll a is absent.
2. The stored food is in the form of mannitol and laminarin is toxic to them.
3. Their cell walls have algin and polysulphate esters.
4. The flagellar number is 2, unequal in size and attached laterally.
Match each item in Column I with one item in Column II and select the correct option from the codes given:
COLUMN I |
|
COLUMN II |
|
A |
Mosaicism in plants |
P |
Prion |
B |
CJD in humans |
Q |
Sporozoan |
C |
Smut in wheat |
R |
Virus |
D |
Malaria in humans |
S |
Fungus |
Codes
|
A |
B |
C |
D |
1. |
P |
Q |
R |
S |
2. |
R |
P |
S |
Q |
3. |
Q |
R |
P |
S |
4. |
S |
P |
Q |
R |
Match the following diseases with the causative organism and select the correct option.
Column -I | Column- II |
(a) Gregarious, polyphagous pest | (i) Asterias |
(b) Adult with radial symmetry and larva with bilateral symmetry | (ii) Scorpion |
(c) Book lungs | (iii) Ctenoplana |
(d) Bioluminescence | (iv) Locusta |
(a) | (b) | (c) | (d) | |
1. | (iv) | (i) | (ii) | (iii) |
2. | (iii) | (ii) | (i) | (iv) |
3. | (ii) | (i) | (iii) | (iv) |
4. | (i) | (iii) | (ii) | (iv) |
All the following are correct regarding mycoplasma except:
1. they lack a cell wall
2. they are obligate aerobes
3. they are smallest living cells known
4. many are pathogenic in plants and animals
1. | absence of true coelom but the presence of metamerism |
2. | presence of neither true coelom nor metamerism |
3. | presence of true coelom but the absence of metamerism |
4. | presence of true coelom and metamerism (metamerisation) |
Phylogenetic system of classification is based on
1. evolutionary relationships
2. morphological features
3. chemical constituents
4.floral characters
Consider the following features:
(a) Organ system level of organization
(b) Bilateral symmetry
(c) True coelomates with the segmentation of the body
Select the correct option of animal groups that possess all the above characteristics.
1. Annelida, Mollusca and Chordata
2. Annelida, Arthropoda, and Chordata
3. Annelida, Arthropoda, and Mollusca
4. Arthropoda, Mollusca, and Chordata
1. | Class | 2. | Phylum |
3. | Family | 4. | Kingdom |
Which group of bacteria are important decomposers, helpful in production of antibiotics and curd from milk and fix nitrogen in legume plants?
1. Photosynthetic autotrophs
2. Chemosynthetic autotrophs
3. Heterotrophs
4. Methanogens
1. | Species → Genus → Family → Order → Class → Division → Kingdom |
2. | Species → Genus → Family → Class → Order → Division → Kingdom |
3. | Species → Genus → Order → Family → Class → Division → Kingdom |
4. | Genus → Species → Family → Order → Class → Kingdom → Division |
Which of the following environmental conditions are essential for the optimum growth of Mucor on a piece of bread?
(A) | The temperature of about 25 °C |
(B) | The temperature of about 5 °C |
(C) | Relative humidity of about 5% |
(D) | Relative humidity of about 95% |
(E) | A shady place |
(F) | A brightly illuminated place |
Choose the answer from the following options:
1. A, C, and E only
2. A, D, and E only
3. B, D, and E only
4. B, C, and F only
Which of the following pairs is not correctly matched?
1. |
Cnidocyte |
Ctenophora |
2. |
Stomochord |
Hemichordates |
3. |
Notochord |
Protochordates |
4. |
Radula |
Mollusks |
In oogamy, fertilization occurs between
1. Small non-motile female gamete and large motile male gamete
2. Large non-motile female gamete and small motile male gamete
3. A large non-motile female gamete and a small non-motile male gamete
4. A large motile female gamete and a small non-motile male gamete
Which of the following statements is incorrect about gymnosperms?
1. They are heterosporous
2. Male and female gametophytes are free-living
3. Most of them have narrow leaves with thick cuticles
4. Their seeds are not covered
Aves are chordates characterized by all the following except:
1. Bony endoskeleton with pneumatic long bones
2. Dry skin with oil gland at the base of the tail
3. Homoiothermy
4. Scales generally present on the fore limbs
Consider the following four statements:
(A) | The sporophyte in liverworts is more elaborate than that in mosses |
(B) | Salvinia is heterosporous |
(C) | The life cycle in all seed-bearing plants is diplontic |
(D) | In Pinus male and female cones are borne on different trees |
The two wrong statements together are:
1. Statements (A) and (B)
2. Statements (A) and (C)
3. Statements (A) and (D)
4. Statements (B) and (C)
Leaves become modified into spines in
1. Pea
2. Onion
3. Silk Cotton
4. Opuntia
Beginning from the root cap, the correct chronological sequence of the various region of a root tip is:
1. Region of meristematic activity → Region of elongation → Region of maturation
2. Region of maturation→ Region of elongation → Region of meristematic activity
3. Region of meristematic activity → Region of maturation → Region of elongation
4. Region of elongation → Region of maturation → Region of meristematic activity
A major characteristic of the monocot root is the presence of:
1. | Scattered vascular bundles |
2. | Vasculature without cambium |
3. | Cambium sandwiched between phloem and xylem along the radius |
4. | Open vascular bundles |
Correct position of floral parts over thalamus in the mustard plant is:
1. | Gynoecium occupies the highest position, while the other parts are situated below it. |
2. | Margin of the thalamus grows upward, enclosing the ovary completely, and other parts arise below the ovary. |
3. | Gynoecium is present in the center and other parts cover it partially. |
4. | Gynoecium is situated in the center, and other parts of the flower are located at the rim of the thalamus, at the same level. |
Identify the incorrect statement:
1. | Gymnosperms lack vessels in their xylem |
2. | In stem, arrangement of xylem is exarch and it is endarch in root |
3. | Gymnosperms lack sieve tubes and companion cells in their phloem |
4. | Bast fibres are genrally absent in the primary phloem |
Identify the incorrect comparison between monocots and dicots in general:
Character | Monocots | Dicots | |
1. | Leaves | Parallel venation | Reticulate venation |
2. | Roots | Primary root of short duration, replaced by adventitial roots forming fibrous or fleshy root systems | Develops from the radicle. Primary root often persists forming strong tap roots and secondary roots |
3. | Plant stem: Vascular bundles | Ring of primary bundles with cambium, differentiated into cortex and stele | Numerous scattered bundles in ground parenchyma, cambium mostly absent, no differentiation between cortical and stelar regions |
4. | Flowers | Parts in threes (trimerous) or multiples of three | Fours (tetramerous) or fives (pentamerous) |
Identify the correct features of Mango and Coconut fruits.
(i) | In both, fruit is a drupe |
(ii) | Endocarp is edible in both |
(iii) | Mesocarp in Coconut is fibrous, and in Mango, it is fleshy |
(iv) | In both, the fruit develops from the monocarpellary ovary |
Select the correct option from below:
1. (i), (iii) and (iv) only
2. (i), (ii) and (iii) only
3. (i) and (iv) only
4. (i) and (ii) only
In the given diagram of a dicot root, the highlighted blue portion:
I. is the endodermis and is included in the stele
II. is the pericycle and is included in the stele
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
What is incorrect regarding the double helix model of DNA given by Watson and Crick?
1. | At each step of ascent the strand turns | 360 |
2. | The pitch | 3.4 nm |
3. | The rise per base pair | 0.34 nm |
4. | Diameter | 10 nm |
Identify the incorrect statement:
1. | In an animal cell, the steroidal hormones are synthesized in SER. |
2. | The sarcoplasmic reticulum is a type of rough endoplasmic reticulum. |
3. | The cis and trans faces of Golgi are entirely different but interconnected. |
4. | Lysosomes contain acid hydrolases. |
A molecule of ATP is structurally most similar to :
1. RNA nucleotide
2. DNA nucleotide
3. amino acid
4. fatty acid
The type of connective tissue shown in A and B in the given diagram are respectively located in:
1. Tendon and Ligament
2. Ligament and Tendon
3. Tendon and Skin
4. Skin and Tendon
Many elements are found in living organisms either free or in the form of compounds. One of the following is not, found in living organisms.
1. Silicon
2. Magnesium
3. Iron
4. Sodium
Vacuole in a plant cell
1. Lacks membrane and contains air.
2. Lacks membrane and contains water and excretory substances.
3. Is membrane bound and contains storage proteins and lipids.
4. Is membrane bound and contains water and excretory substances.
One very special feature in earthworm (Pheretima) is that –
1. Fertilisation for eggs occurs inside the body
2. The typhlosole greatly increases the effective absorption area of the digested food in the intestine
3. The S- shaped setae embedded in the integument are the defensive weapons used against the enemies
4. It has a long dorsal tubular heart
Different cells have different sizes. Arrange the following cells in an ascending order of their size. Choose the correct option among the followings
i. Mycoplasma
ii. Ostrich eggs
iii. Human RBC
iv. Bacteria
Options:
1. i, iv, iii & ii
2. i, ii, iii & iv
3. ii, i, iii & iv
4. iii, ii, i& iv
The number of carbon atoms in arachidonic acid excluding the carboxyl carbon is:
1. 15
2. 16
3. 19
4. 20
Important site for formation of glycoproteins and glycolipids is
1. Vacuole
2. Golgi apparatus
3. Plastid
4. Lysosome
If a cell membrane allows hydrophilic molecules to pass into a cell, this will most likely be due to:
1. peripheral membrane proteins.
2. integral membrane proteins.
3. peripheral membrane carbohydrates.
4. integral membrane carbohydrates.
The function of the gap junction is to?
1. | Perform cementing to keep neighbouring cells together |
2. | Facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules |
3. | Separate two cells from each other |
4. | Stop substances from leaking across a tissue |
The structure that helps in cell wall formation, DNA replication and respiration in bacteria is :
1. Mesosome
2. Chromatophores
3. Pilus
4. Nucleoid
After water and proteins, which of the following components has maximum percentage of the total mass in a typical living cell?
1. Carbohydrates
2. Nucleic acids
3. Lipids
4. Ions
A cell has 2C DNA and 2N chromosome number in G1 phase. What will be the DNA content and chromosome number at the end of S phase or in G2 phase?
1. 2C and 2N
2. 4C and 2N
3. 2C and 4N
4. 4C and 4N
1. | Prophase II: | The nuclear membrane disappears by the end of this stage and the chromosomes again become compact. |
2. | Metaphase II: | The chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids. |
3. | Anaphase II: | The homologous chromosomes separate, while sister chromatids remain associated at their centromeres. |
4. | Telophase II: | The two groups of chromosomes once again get enclosed by a nuclear envelope |
During cytokinesis:
I: | A cleavage furrow forms in the center of the animal cell and extends to the periphery |
II. | A cell plate is formed at the periphery in plant cells and deepens towards the center |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Which stage of the mitotic division in a cell shown in the options depicts a ‘transition’ to metaphase?
1. | 2. | ||
3. | 4. |