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MODEL PAPER 7 BIOLOGY - MODEL PAPER 7

Rajasthan Board (RBSE) - STD 11 Science - BIOLOGY (Rajasthan - English Medium). 38 questions in this chapter.

Question types

MODEL PAPER 7 question types

38 questions across 6 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.

38
Questions
6
Question groups
5
Question types
Sample Questions

MODEL PAPER 7 questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 2M.C.Q (1 Marks)1 Mark
Anatomy of stem differs from the root in:
  • A
    Stem hairs, absence of chloroplast an broad cortex
  • B
    Cutinized epidermal wall, conjoint vas bundle, and narrow cortex
  • C
    Xylem exarch, vascular bundle radial and narrow cortex
  • D
    Secondary vascular growth and presen stomata
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Q 3M.C.Q (1 Marks)1 Mark
A farmer wants to get a higher yield of grapes. Which Plant Growth Regulator (PGR) should he use on grape plants?
  • A
    Gibberellins
  • B
    Ethylene
  • C
    Abscisic acid
  • D
    Cytokinins
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Q 82 Marks Questions2 Marks
A cyclic process is occurring in $C_3$ plants, which is light-dependent and needs $CO _2$. This process does not produce, but consumes energy.
i. Can you name the given process?
ii. Is it essential for survival?
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Q 164 Marks Questions4 Marks
Various parts of the plant such as stems leaves, and even fruits are modified into underground parts to perform various functions such as stems, leaves, and even fruits.
The stems in ginger and banana are underground and swollen due to storage of food. They are called rhizome. Rhizome of ginger is a modification of stem because it bears nodes, internodes, terminal buds, scaly leaves and buds, which give rise to aerial shoots. It is not a root because root does not have nodes and internodes. Also, rhizome does not perform the function of roots i.e. anchorage and absorption, rather it serve as reservoir for storage of food. Similarly, corm is an underground stem in Colocasia (jimikand) The tips of the underground stem in potato become swollen due to accumulation of food and forms tuber.

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i. Observe the given flow chart and mention what are the four types of Underground stem modification also mention one example of each. (1)
ii. Ginger is an underground stem but why it is distinguished from a root? (1)
iii. Why do the tips of modified stems in potatoes become swollen? (2)

OR

Are all underground parts of a plant roots? (2)
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Q 174 Marks Questions4 Marks
Sarcodines are unicellular/jelly-like protozoa found in fresh or sea water and in moist soil. Their body lacks a periplast. Therefore, they may be naked or covered by a calcareous shell. They usually lack flagella and have temporary protoplasmic outgrowths called pseudopodia. These pseudopodia or false feet help in movement and capturing prey. They include free-living forms such as Amoeba or parasitic forms such as Entamoeba. Zoo flagellates ciliates and I sporozoans are other groups of protozoan protists. They are all unicellular and heterotrophic. They may be holozoic, saprobic or parasitic.

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i. Write two lines about flagellated protozoans and also mention some flagellated protozoans. (1)
ii. Observe the given protozoan classification and mention what is the basis of protozoan classification. (1)
iii. Mention some locomotory organs of protozoa. (2)

OR

Which protozoan group has two nuclei, macronucleus, and micronucleus? Mention characteristics of it. (2)
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Q 23Assertion & Reason1 Mark
Assertion (A): Vital capacity is higher in athletes than non - athletes.
Reason (R): Vital capacity is about 3.5-4.5 litres in a normal adult person.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
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Q 24Assertion & Reason1 Mark
Assertion (A): Food vacuoles of Paramecium are noncontractile vacuoles.
Reason (R): They are meant for extracellular digestion.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A
  • C
    A is true but R is false.
  • D
    A is false but R is true.
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Q 25Assertion & Reason1 Mark
Assertion (A): Voice of women and children is high pitched whereas that of men is low pitched.
Reason (R): Vocal cords of men are longer than of women and children.
  • A
    Both A and R are true and R is the correct explanation of A
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    Both A and R are true but R is not the correct explanation of A.
  • D
    A is true but R is false.
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Q 26Assertion & Reason1 Mark
Assertion (A): Cyanide causes toxicity in man.
Reason (R): Cyanide impairs the functioning of our nervous system.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A
  • C
    A is true but R is false.
  • D
    A is false but R is true.
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