Test 4 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 4 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718How many of the following plants have axile placentation?
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China rose, Petunia, Trifolium, Colchicum, Tomato, Indigofera, Lemon, Tobacco, Gloriosa, Lupin, Aloe |
1. 4
2. 5
3. 6
4. 8
The given life cycle represents a/an:
1. Bryophyte
2. Pteridophyte
3. Gymnosperm
4. Angiosperm
Match each item in Column I with one item in Column II and select the correct option from the codes given:
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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
Choose the correct one.
(a) Growth cannot be taken as a defining property of living organisms.
(b) Dead organism does not grow.
(c) Reproduction cannot be an all inclusive defining characteristic of living organisms.
(d) No non-living object is capable of replicating itself.
(e) Metabolism in a test tube is non-living.
(f) Metabolism is a defining feature of all living organisms.
1. (a) and (c)
2. All except (e)
3. All except (c)
4. All of these
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
Emergent properties at a higher level of biological organization:
I. are not present in its constituents
II. arise as a result of interaction amongst the constituents
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 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 statement.
| 1. | Sapwood is involved in conduction of water and minerals from roots to leaves. |
| 2. | Sapwood is the innermost secondary xylem and is lighter in colour |
| 3. | Due to deposition of tannins, resins, oils etc., heartwood is dark in colour. |
| 4. | Heart wood does not conduct water but gives mechanical support. |
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
From the outside to the inside of a mature woody stem, the correct sequence of layers will be:
1. Bark, Vascular cambium, Wood [xylem], Pith
2. Bark, Wood [xylem], Vascular cambium, Pith
3. Pith, Wood [xylem], Vascular cambium, Bark
4. Pith, Vascular cambium, Wood [xylem], Bark
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.
| 1. | All plants are composed of different kinds of cells which form the tissues of the plant. |
| 2. | Animal cells have a thin outer layer which is today known as ‘plasma membrane’. |
| 3. | Cells divide and new cells are formed from pre-existing cells. |
| 4. | The presence of cell wall is a unique character of the plant cells. |
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
If the head of the cockroach is cut off, it will:
1. still live as long as one week
2. still live as long as one month
3. regenerate its head completely
4. regenerate its head but not eyes
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
| Statement I | Both the cilium and flagellum emerge from centriole-like structure called the centrosome. |
| Statement II | Centrosome is an organelle usually containing two cylindrical structures called centrioles. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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. |  |
