ICSE X/ICSE 10th Class Biology MCQ Question Answer Sample Test,Sample questions

Question:
 Plant with variegated leaves

1.Lotus

2.Papaya

3.Hoya kerrii

4.Croton


Question:
 Relative concentration of two solution to determine extent of diffusion

1.Humidity

2.Tonocity

3.Turgidity

4.Flaccidity


Question:
A plant cell may burst when _____________

1.turgor pressure equalizes wall pressure

2.turgor pressure exceeds wall pressure

3.wall pressure exceeds turgor pressure

4. None of these


Question:
A plant in which stomata are sunken

1.Xerophytes

2.Conifers

3.Thallophytes

4.Streptophyta


Question:
A plant in which stomata are sunken

1.Xerophytes

2.Conifers

3.Thallophytes

4.Streptophyta


Question:
Active transport

1.Movement of water through semi-permeable membrane from a solution of low concentration to the higher concentration

2.Movement of gases or dissolved Substances in solution from a region of high concentration to a region of low concentration by direct contact

3.Movement of a solute from a repgion of high electrochemical potential on one side of the cel1 4 rtilnn the onosite side

4.Passage of salt or ions from its lower concentration to the higher concentration from living membrane


Question:
Aster

1.A paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope

2.Two identical copies of chromosome that are firmly attached at the centromere region

3.A cellular structure shaped like a star, consisting of a centrosome and its associated microtubules during the early stages of mitosis

4.Point of attachment of the kinetochore


Question:
Cambium

1.At the external, periclinal cell wall of epidermal cells

2.Between xylem and phloem

3.In the centre of vascular bundle

4.Raised, oval or circular areas on the woody stems


Question:
Chlorophyll

1.To support the leaf and transport water, mineral jons and sucrose (sugar)

2.Allow carbon dioxide to diffuse into the leaf and oxygen to diffuse out

3.Absorbs sunlight to convert solar energy into chemical energy

4.To protect the leaf from infection and prevent water los5 without blocking out light


Question:
Choose the appropriate labelling for the given figure.

1. 1-Sugar, 2- Phosphate, 3- Base, 4-Hydrogen bond, 5- Base

2. 1-Phosphate, 2-Sugar, 3- Hydrogen bond, 4- Base, 5- Base

3.1-Phosphate, 2-Sugar, 3- Base, 4-Hydrogen bond, 5- Base

4.1-Phosphate, 2- Base, 3-Sugar, 4-Hydrogen bond, 5- Base


Question:
Chromosome

1.Double stranded molecule having long chain of nucleotides

2.Single stranded molecule having short chain of nucleotides

3. Condensed form of nucleoprotein

4.Uncondensed form of nucleoprotein


Question:
Guanine and Cytosine are attached with ________________ hydrogen bonds.

1.two

2.three

3.four

4.one


Question:
Guard cells

1.Regulate the movement of water, ions and hormones into and out of the vascular system

2.Allowing gas exchange and controlling water loss within the leaf

3.Transport of water and minerals vertically

4.Responsible for the transportation of materials into the central cylinder of the root


Question:
Hydathodes

1.Below the epidermis and cuticle on the leaves

2.On the margins of the leaves of herbaceous plants

3.Below the epidermis but outside of the vascular bundles on stems

4.Stomatal pores located in leaf epidermis


Question:
Imbibition

1.Phenomenon by which loving or dead plant cells absorb water by surface attraction

2.Movement of water molecules from higher concentration to the lower concentration region

3.Loss of water as tiny drops along the margins or the tips of the leaves

4.Loss of cell sap from a cut stem of the plant


Question:
Nitrogenous bases that attached with two hydrogen bonds are:

1. Adenine and Thymine

2.Cytosine and Guanine

3.Guanine and Thymine

4.Adenine and Guanine


Question:
Nucleosome

1.A membrane-bound organelle that contains epigenetic information

2.Non-chromosomal DNA freely floating in the cytosol

3.A complex of proteins that controls nuclear import

4.A repeating unit of chromatin


Question:
Palisade mesophyll

1.Upper epidermis in a leaf

2.Lower epidermis in a leaf

3.Between upper epidermis and spongy mesophyll

4.Between lower epidermis and spongy mesophyll


Question:
Pericycle

1.Part of the plant that protect the pith

2.To absorb water and mineral with the help at unit hairs

3.Formation of lateral roots by rapidly dividing near the xylem elements of the root

4.Outermost layer of protective cells in a root


Question:
Photosynthesis

1. Synthesis of food from carbon dioxide and water in the presence of chlorophyll and light energy

2.Loss of water as water vapour from aerial parts of the plant

3.Contraction of cytoplasm from cell wall due to withdrawal of water when placed in hypertonic solution

4.Transmission of genetically based characteristics from parents to off springs


Question:
Process against concentration gradient

1.Osmosis

2.Translocation

3.Diffusion

4.Transpiration


Question:
Proteins that bind and package DNA

1.Nucleosomes

2.Chromatins

3.Telomerases

4.Histones


Question:
Spindle fibres

1.Act as packaging elements for the DNA

2.Carry the basic genetic material

3.Equally divide the chromosomes in a parental cell into two daughter cells

4.Hold the two centrioles at the two opposite poles and help the spindle apparatus to position during nuclear division


Question:
Spongy Parenchyma

1.To absorb more light and increase the rate of photosynthesis

2.To allow more light to reach the palisade cells

3.To transports water and minerals from the roots up the plant stem and into the leaves

4.Air spaces allow gases to diffuse through the leaf


Question:
Stroma

1.flattened membrane sac inside the chloroplast

2.fluid filling up the inner space of the chloroplasts

3.stacks of thylakoids

4. type of ground tissue found in the plant's leaves


Question:
The genotype of Generation 1 third child ____________ and 1 grand child _______________ .

1.AA, aa

2.Aa, Aa

3.Aa, AA

4.aa, Aa


Question:
The salt sprinkled on the slugs skin leads killing due to_____________

1.inward flow of water through endosmosis

2.outward flow of water through endosmosis

3.inward flow of water through exosmosis

4.outward flow of water through exosmosis


Question:
The small openings present in stems of plants are classified as ______________.

1.plasmodesmata

2.lenticels

3.guard cells

4.stomata


Question:
The wilting of plants result due to excess of _______________

1.absorption

2.photosynthesis

3.transpiration

4.respiration


Question:
What does the basic structure of nucleotide consist?

1. Sulphate, phosphate, nitrogenous base

2.Phosphate hydrogen bond, pentose

3.Phosphate, nitrogenous base, pentose

4.All three are nitrogenous bases


Question:
What is the name of the globular protein around which DNA is wrapped in a chromosome?

1.Nucleolus

2.Chromatin

3.Histone

4.Nucleosome


Question:
What would be the phenotype of the generation 1 when two homogenous alleles (dominant and recessive) are crossed?

1.100% Aa

2.75% Aa, 25% aa

3.50%, AA, 50% aa

4.0% Aa, 50% aa


Question:
Which of the following is the genotype from generation 1 parents for Mendel's cross?

1.AA, aa

2.Aa, aa

3. AA, Aa

4.Aa, Aa


Question:
Which one of the following statements is true?

1.Dominant trait is expressed in homozygous conditions only.

2.Recessive trait cannot be expressed in heterozygous conditions.

3.Recessive trait can only be expressed in homozygous condition.

4.Recessive trait can always be expressed in heterozygous condition.


Question:
_____________are the essential needs for photosynthesis.

1.Chlorophyll and O2

2.Sunlight and CO2

3.Chlorophyll and sunlight

4.Both 2 and 3


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