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If the base sequence of a codon in mRNA is 5’ – AUG – 3′ the sequence of tRNA pairing with it must be
General Science Biology Zoology Class 12th NEET UG NEET UG Preparation
Q. 11 of Quiz-1438 (Que-ID : 2954)
If the base sequence of a codon in mRNA is 5’ – AUG – 3′ the sequence of tRNA pairing with it must be
- 5’ – UAC – 3’
- 5’ – CAU – 3’
- 5’-AUG – 3’
- 5’ – GUA – 3’
Ans → (b)5’ – CAU – 3’
Explanation →
This question is taken from this post → Molecular basis of inheritance (class 12th Biology) Revision Test | MCQs For NEET - attemp/practice
More MCQs in - Molecular basis of inheritance (class 12th Biology) Revision Test | MCQs For NEET
Q. 1 of Quiz-1438 (Que-ID : 2944)
Which of the following statements is the most appropriate for sickle cell anaemia ?
- It cannot be treated with iron supplements.
- It is a molecular disease.
- It conferes resistance to acquiring malaria
- All of the above.
Q. 3 of Quiz-1438 (Que-ID : 2946)
The human chromosome with the highest and least number of genes in them are respectively
- chromosome 21 and Y
- chromosome 1 and X
- chromosome 1 and Y
- chromosome X and Y
Q. 4 of Quiz-1438 (Que-ID : 2947)
Who amongst the following scientist had no contribution in the development of the double helix model for the structure of DN A ?
- Rosalind Franklin
- Maurice Wilkins
- Erwin Chargaff
- Meselson and Stahl
Q. 5 of Quiz-1438 (Que-ID : 2948)
Which of the following steps in transcription is catalysed by RNA polymerase ?
- Initiation
- Elongation
- Termination
- All of the above
Q. 6 of Quiz-1438 (Que-ID : 2949)
Control of gene expression takes place at the level of
- DNA-replication
- transcription
- translation
- none of the above
Q. 7 of Quiz-1438 (Que-ID : 2950)
Which was the last human chromosome to be completely sequenced ?
- Chromosome 1
- Chromosome 11
- Chromosome 21
- Chromosome X
Q. 8 of Quiz-1438 (Que-ID : 2951)
In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called
- A – DNA
- B – DNA
- cDNA
- rDNA
Q. 9 of Quiz-1438 (Que-ID : 2952)
If the sequence of initrogen bases of the coding strand of DNA in a transcription unit is: 5’ – ATGAATG – 3’, the sequence of bases in its RNA transcript would be
- 5’ – AUG A AUG – 3’
- 5’ – UACUU AC – 3’
- 5’ – CAUUCAU – 3’
- 5’ – GUAAGUA – 3’.
Q. 10 of Quiz-1438 (Que-ID : 2953)
The RNA polymerase holocnzyme transcribes
- the promoter, structural gene and the terminator region
- the promoter and the terminator region
- the structural gene and the terminator region
- the structural gene only.
Q. 11 of Quiz-1438 (Que-ID : 2954)
If the base sequence of a codon in mRNA is 5’ – AUG – 3′ the sequence of tRNA pairing with it must be
- 5’ – UAC – 3’
- 5’ – CAU – 3’
- 5’-AUG – 3’
- 5’ – GUA – 3’
Q. 12 of Quiz-1438 (Que-ID : 2955)
The amino acid attaches to the tRNA at its
- 5’- end
- 3’ – end
- anticodon site
- DHUloop.
Q. 13 of Quiz-1438 (Que-ID : 2956)
To initiate translation, the wiRNA first bind to
- the smaller ribosomal sub-unit
- the larger ribosomal sub-unit
- the whole ribosome
- no such specificity exists
Q. 14 of Quiz-1438 (Que-ID : 2957)
In E. colt, the lac operon gets switched on when
- lactose is present and it binds to the repressor
- repressor binds to operator
- RNA polymerase binds to the operator
- lactose is present and it binds to RNA polymerase.
Q. 15 of Quiz-1438 (Que-ID : 2958)
In DNA strand, the nucleotides are linked together by
- glycosidic bonds
- phosphodiester bonds
- peptide bonds
- hydrogen bonds
Q. 16 of Quiz-1438 (Que-ID : 2959)
If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it ?
- 20%
- 40%
- 30%
- 60%
Q. 17 of Quiz-1438 (Que-ID : 2960)
If the sequence of bases in one strand of DNA is ATGCATGCA, what would be the sequence of bases on complementary strand ?
- ATGCATGCA
- AUGCAUGCA
- TACTACGT
- UACGUACGU
Q. 18 of Quiz-1438 (Que-ID : 2961)
How far is each base pair from the next one in DNA double helix model ?
- 2 nm
- 3.4 nm
- 34 nm
- 0.34 nm
Q. 19 of Quiz-1438 (Que-ID : 2962)
Synthesis of DNA from RNA is explained by
- central dogma reverse
- reverse transcription
- feminism
- all of these
Q. 20 of Quiz-1438 (Que-ID : 2963)
Histone proteins are
- basic, negatively charged
- basic, positively charged
- acidic, positively charged
- acidic, negatively charged
Q. 21 of Quiz-1438 (Que-ID : 2964)
The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called
- nucleotides
- nucleosides
- histone octamer
- nucleosomes
Q. 22 of Quiz-1438 (Que-ID : 2965)
Find out the wrong statement about heterochromatin,
- It is densely packed
- It stains dark
- It is transcriptionally active.
- It is late replicating
Q. 23 of Quiz-1438 (Que-ID : 2966)
They year 2003 was celebrated as the 50th anniversary of discovery of
- transposons by Barbare Me Clintock
- structure of DNA by Watson and Crick
- Mendel’s laws of inheritance
- biotechnology by Kary Muliis.
Q. 24 of Quiz-1438 (Que-ID : 2967)
Amino acids which are specified by single codons are
- phenylalanine and arginine
- tryptophan and methionine
- valine and proline
- methionine and aroinine
Q. 25 of Quiz-1438 (Que-ID : 2968)
Which out of the following statements is incorrect ?
- Genetic code is ambiguous.
- Genetic code is deqenerate
- Genetic code is universal
- Genetic code is non-overlanning.
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Q. 1 of Quiz- (Que-ID : 3369)
Integrated Pest Management (IPM) discourages the excessive used of
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Q. 25 of Quiz- (Que-ID : 3518)
Wild life is destroyed most by
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- Mass scale hunting
- Destruction of natural habitats
- Natural calamity
Q. 10 of Quiz- (Que-ID : 2853)
An embryo may sometimes develop from any cell of embryo sac other than egg. It is termed as
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The symbiotic association between fungi and roots of higher plants is referred to as
- lichen
- mycorrhiza
- biofertiliser
- biocontrol agent
Q. 2 of Quiz- (Que-ID : 3220)
Artabotrys is a hook climber in which the hooks are modified
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Q. 4 of Quiz- (Que-ID : 3297)
Which is not a vestigial organ in man ?
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- Vermiform appendix
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Q. 2 of Quiz- (Que-ID : 2720)
Which groups holds max nutritional diversity
- monera
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- Anamalia
Q. 25 of Quiz- (Que-ID : 3143)
ψp denotes to
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Q. 10 of Quiz- (Que-ID : 3528)
Increased skin cancer and high mutation rate are due to
- Acid Rain
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- CO2 Pollution
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Which of the following is used to grow microbes?
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The number of deaths in the population during a given period is referred to
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- None of the above
Q. 1 of Quiz- (Que-ID : 2944)
Which of the following statements is the most appropriate for sickle cell anaemia ?
- It cannot be treated with iron supplements.
- It is a molecular disease.
- It conferes resistance to acquiring malaria
- All of the above.
Q. 23 of Quiz- (Que-ID : 2636)
Dentine is originated from which cell
- Amiloblast cell
- Odontioblast cell
- Chief cell
- Peptic cell
Q. 15 of Quiz- (Que-ID : 3133)
Wilting of a plant results from excessive
- respiration
- photosynthesis
- absorption
- transpiration
Q. 7 of Quiz- (Que-ID : 3375)
Biofertilisers are the living organisms which
- bring about soil nutrient enrichment
- maximise the ecological benefits
- minimise the environmental hazards
- all of these
Q. 8 of Quiz- (Que-ID : 3276)
Which of the following is used to grow microbes?
- Laminaria
- Gelidium
- Chlorella
- Sargassum
Q. 18 of Quiz- (Que-ID : 3161)
The minimum amount of energy required to initiate a chemical reaction is called
- enzymatic energy
- activation energy
- substrate energy
- initiation energy
Q. 5 of Quiz- (Que-ID : 2923)
What is the probability of production of dwarf offsprings in a cross betweeen two heterozygous tall pea plants ?
- Zero
- 50%
- 25%
- 100%
Q. 23 of Quiz- (Que-ID : 2766)
Implantation of embryo and placentation is under control of
- FSH
- Estrogen
- Progesterone
- Estradiol
Q. 24 of Quiz- (Que-ID : 3392)
Dragonflies are used to get rid of
- mosquitoes
- aphids
- butterfly caterpillars
- both (a) and (b)
Q. 21 of Quiz- (Que-ID : 3339)
Amoebic dysentery (amoebiasis) is caused by
- Entamoeba histolytica
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- test cross
- back cross
- reciprocal cross
- dihybrid cross
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What is the structural and functional unit of lungs
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- Bronchi
- Both a and c
Q. 18 of Quiz- (Que-ID : 2686)
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- 65-59
- 70-75
- 25-45
- None of the above
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- carbonic dehydrogenase
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- Amylase
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Q. 12 of Quiz- (Que-ID : 3505)
First National park developed in India is
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- Jim Corbett
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Q. 8 of Quiz- (Que-ID : 3326)
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- Streptococcus pnemoniae
- Salmonella typhimurium
- Plasmodium vivax.
Q. 11 of Quiz- (Que-ID : 2979)
What are the structural and functional unit of kidney
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Q. 22 of Quiz- (Que-ID : 3115)
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- Genetic code is universal
- Genetic code is non-overlanning.
Q. 2 of Quiz- (Que-ID : 3270)
Which of the followings plant material is an efficient water imbibant?
- Agar
- Cellulose
- Lignin
- Pectin
Q. 13 of Quiz- (Que-ID : 2831)
The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively
- 12, 24, 12
- 24, 12, 12
- 12, 24, 24
- 24, 12, 24
Q. 20 of Quiz- (Que-ID : 3438)
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- Human insulin
- Penicillin
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- germ cells
- semens
- plants/seeds with all the diverse alleles for all genes
- egg cells
Q. 25 of Quiz- (Que-ID : 3093)
Which one of the following statements about cytochrome P-450 is wrong?
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- It is an enzyme involved in oxidation reaction
- It has an important role in metabolism
- It contains iron
Q. 10 of Quiz- (Que-ID : 82)
Which of the following is used in the manufacturing of candle?
- Bees Wax
- Spermaceti wax
- Lanodin wax
- Paraffin wax
Q. 4 of Quiz- (Que-ID : 2822)
Meiosis does not occur in
- asexually reproducing diploid individuals
- sexually reproducing haploid individuals
- sexually reproducing diploid individuals
- all of these.
Q. 19 of Quiz- (Que-ID : 3537)
Act formulated in 1996 was
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- Water (Prevention and control of Pollution) Act
- Environment protection Act
Q. 12 of Quiz- (Que-ID : 3380)
Statins used for lowering blood cholesterol level are extracted from
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- viruses
- yeast
Q. 1 of Quiz- (Que-ID : 2944)
Which of the following statements is the most appropriate for sickle cell anaemia ?
- It cannot be treated with iron supplements.
- It is a molecular disease.
- It conferes resistance to acquiring malaria
- All of the above.
Q. 10 of Quiz- (Que-ID : 3178)
The main function of the skin of frog is
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- the storage of energy
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Taxonomic studies depends on
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- External and internal structure of organisms
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Q. 24 of Quiz- (Que-ID : 2867)
The female gametophyte of a typical dicot at the time of fertilisation is
- 8 – celled
- 7 – celled
- 6 – celled
- 5 – celled
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