DNA element, which has ability to change its position is called :
a.
Intron
b.
Recon
c.
Cistron
d.
Transposon
Correct Answer
Step-by-Step AI Explanation
Verified Method
Transposons, often called 'jumping genes', are DNA sequences that can change their position within the genome. Introns are non-coding regions of DNA; Recons are the smallest units of recombination; Cistrons are functional units of DNA encoding a polypeptide.
Q2mcq
The selected tissue to establish a new plant in a culture medium :
a.
Embryoid
b.
Callus
c.
Plantlets
d.
Explant
Correct Answer
Step-by-Step AI Explanation
Verified Method
Explant is any part of a plant that is taken from the parent plant and placed into a culture medium to initiate tissue culture. Callus is the mass of undifferentiated cells formed after inoculation; Plantlets are young plants developed in culture; Embryoids are embryo-like structures.
Q3mcq
Initiation codon is :
a.
AUG
Correct Answer
b.
UUU
c.
UAG
d.
UGA
Step-by-Step AI Explanation
Verified Method
AUG is the universal initiation codon that codes for methionine. UUU codes for phenylalanine, while UAG and UGA are stop codons.
Q4mcq
Match the following about mushroom cultivation.
(1)Straw size (i)20 cm
(2)Distance between blocks (ii)75 - 85%
(3)Cap size at harvesting (iii)2 - 4 inch
(4)Relative humidity (iv)10 - 12 cm
According to standard mushroom cultivation practices: (1) Straw size is 2-4 inches (iii), (2) Distance between blocks is 10-12 cm (iv), (3) Cap size at harvesting is 20 cm (i), and (4) Relative humidity required is 75-85% (ii). Therefore, (1)-(iii), (2)-(iv), (3)-(i), (4)-(ii) is the correct match.
Q5mcq
The enzyme which is purified from calf intestine :
a.
Restriction enzymes
b.
DNA ligase
c.
Helicase
d.
Alkaline phosphatase
Correct Answer
Step-by-Step AI Explanation
Verified Method
Alkaline phosphatase is an enzyme traditionally isolated from calf intestine, commonly used in molecular biology to remove phosphate groups from the 5' end of DNA molecules.
Q6mcq
Solar energy used by green plants for only photosynthesis is :
a.
3 - 10%
b.
2 - 8%
c.
2 - 9%
d.
2 - 10%
Correct Answer
Step-by-Step AI Explanation
Verified Method
Photosynthetically Active Radiation (PAR) used by plants for photosynthesis typically falls within the range of 2-10% of the total incident solar radiation.
Q7mcq
One greenhouse gas contributes 14% of total global warming and another contributes 60%. These are respectively identified as :
a.
CH_4 and CO_2
Correct Answer
b.
N_2O and CO_2
c.
CH_4 and CFC
d.
CFC and CO_2
Step-by-Step AI Explanation
Verified Method
Carbon dioxide (CO_2) is the primary greenhouse gas contributing to approximately 60% of global warming, while Methane (CH_4) contributes to approximately 14%.
Q8mcq
Arrange the correct sequence of ecological hierarchy starting from lower to higher level.
a.
Community → Ecosystem → Landscape → Biome.
Correct Answer
b.
Individual Organism → Population → Landscape → Ecosystem.
c.
Population → Organism → Biome → Landscape.
d.
Landscape → Ecosystem → Biome → Biosphere.
Step-by-Step AI Explanation
Verified Method
The correct ecological hierarchy is: Individual Organism → Population → Community → Ecosystem → Landscape → Biome → Biosphere. Option (a) follows the correct ascending order among the provided sequences.
Q9mcq
The first cell of male gametophyte in angiosperm is __________.
a.
Nucleus
b.
Microspore
Correct Answer
c.
Primary Endosperm nucleus
d.
Megaspore
Step-by-Step AI Explanation
Verified Method
The microspore (pollen grain) is the first cell of the male gametophyte in angiosperms. Upon germination, the microspore undergoes mitosis to form the vegetative and generative cells, representing the early stages of gametophyte development. Nucleus is a cell organelle, Primary Endosperm Nucleus is involved in nutrition/embryo development, and Megaspore is the first cell of the female gametophyte.
Q10mcq
pBR 322, BR stands for :
a.
Plasmid Boliver and Rodriguez
Correct Answer
b.
Plasmid Bacterial Recombination
c.
Plasmid Baltimore and Rodriguez
d.
Plasmid Bacterial Replication
Step-by-Step AI Explanation
Verified Method
pBR 322 is a famous cloning vector. 'p' stands for plasmid, 'BR' stands for the scientists Bolivar and Rodriguez who constructed it, and '322' is the specific number assigned to distinguish it from other plasmids developed in the same laboratory.
🎉 10 Free Sample Solutions Completed
Unlock All 48 Questions & Solutions
Sign up free in seconds to unlock step-by-step AI answers for the remaining 38 questions.
Various stages of succession are given below. From that rearrange them accordingly. Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage, forest stage, submerged free floating stage, marsh meadow stage.
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
(a)Explain the basic concepts involved in plant tissue culture.
OR
(b)Explain the different types of xerophytes based on their adaptive characters with examples.
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
(a)Explain the modern methods of seed storage.
OR
(b)Tabulate the plant parts and its medicinal use of the following :
(i)Holy basil
(ii)Indian gooseberry
(iii)Indian acalypha
(iv)Vilvam
(v)Veldt grape
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
(b)Tabulate the plant parts and its medicinal use of the following : (i)Holy basil (ii)Indian gooseberry (iii)Indian acalypha (iv)Vilvam (v)Veldt grape
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
