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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
General Science Biology Zoology Class 12th NEET UG NEET UG Preparation
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’.
Ans → (d)5’ – GUAAGUA – 3’.
Explanation → Sequence will be 5’ – GUAAGUA – 3’.
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. 17 of Quiz- (Que-ID : 2910)
spot the odd one out from the following structures with reference to the male reproductive system
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- Isthmus
Q. 6 of Quiz- (Que-ID : 3049)
Which one of the following describes the spikelet of a cereal or grass plant
- inferior ovary
- dehiscent fruit
- pair of glumes
- fused calyx
Q. 16 of Quiz- (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. 22 of Quiz- (Que-ID : 3415)
Who discovered Restricted endonucleas enzymes?
- Smith and Nathane
- Baiger
- Waxman
- Fleming
Q. 19 of Quiz- (Que-ID : 3337)
Vaccine against polio viruses is an example of
- auto-immunisation
- passive immunisation
- active immunisation
- simple immunisation
Q. 15 of Quiz- (Que-ID : 3458)
The shifting of an organism temporarily from the stressful habitat to a more hospitable area and return when stressful period is over is called
- Suspend
- Migrate
- Hibernation
- Aestivation
Q. 2 of Quiz- (Que-ID : 2745)
Secretin cause stimulation of
- Bile juice
- Water
- Gastric secretion
- Pepsinogen
Q. 5 of Quiz- (Que-ID : 3123)
Which of the following is decreased during increase in humidity in the atmosphere?
- Transpiration
- Photosynthesis
- Respiration
- Glycolysis
Q. 33 of Quiz- (Que-ID : 604)
Which of the following is not a Reptile ?
- Green-turtle
- Crocodile
- Salamandra
- Garden Lizard
Q. 11 of Quiz- (Que-ID : 2829)
The wall of the ovary forms
- pericarp
- fruit wall
- fruit
- both (a) and (b).
Q. 10 of Quiz- (Que-ID : 3103)
Which one of the following mineral elements plays an in biological nitrogen fixation?
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- Manganese
- Zinc
- Molybdenum
Q. 5 of Quiz- (Que-ID : 2618)
Which kind of gland is pancreas
- Exocrine
- Endocrine
- Compound gland
- None of the above
Q. 6 of Quiz- (Que-ID : 2949)
Control of gene expression takes place at the level of
- DNA-replication
- transcription
- translation
- none of the above
Q. 16 of Quiz- (Que-ID : 3259)
Which one of the following is NOT a characteristic of phylum Annelida?
- Ventral nerve cord
- Closed circulatory system
- Segmentation
- Pseudocoelom
Q. 6 of Quiz- (Que-ID : 3324)
Which of the following pathogens causes whooping coough ?
- Legionella spp.
- Burcella melitensis
- Vibrio cholerae
- Burcella melitensis
Q. 22 of Quiz- (Que-ID : 3090)
In the half-leaf experiment of photosynthesis, KOH solution is used because
- It provides O2 to the leaf.
- It provides moisture to the leaf.
- t helps in CO2 fixation
- It absorbs CO2
Q. 23 of Quiz- (Que-ID : 3316)
Amphibians were dominant during _______ period.
- Carboniferous
- Silurian
- Ordovician
- Cambrian
Q. 7 of Quiz- (Que-ID : 431)
Which of the river Originates in Tibetan plateau, Enters India in J&K ?
- Ganga
- Bramaputra
- Indus
- Yamuna
Q. 14 of Quiz- (Que-ID : 3940)
With reference to enzymes, which one of the following statements is true?
- Apoenzyme = Holoenzyme + Coenzyme
- Coenzyme = Apoenzyme + Holoenzyme
- Holoenzyme = Apoenzyme + Coenzyme
- Holoenzyme = Coenzyme ? Apoenzyme
Q. 25 of Quiz- (Que-ID : 2638)
In which condition the faeces are retained in the rectum as the bowel movement occur irregularly
- Indigestion
- Constipation
- Diarrhoea
- None of the above
Q. 27 of Quiz- (Que-ID : 598)
Which of the following is also known as laughing gas ?
- Nitric oxide
- Nitrous oxide
- Nitrogen pentoxide
- Nitrogen
Q. 15 of Quiz- (Que-ID : 3533)
A mutagenic pollutant is:
- Organophosphate
- Resines
- Hydrocarbons
- Nitrogen oxides
Q. 22 of Quiz- (Que-ID : 2991)
Ciliated columnar cells are lined in which of the following
- DCT
- Both a and c
- PCT
- None of the above
Q. 24 of Quiz- (Que-ID : 3542)
The petrol used in engines filled with catalytic converter should be
- Simple petrol
- Any type of petrol
- Unleaded petrol
- None of the above
Q. 13 of Quiz- (Que-ID : 2881)
Which of the following cannot be detected in a developing foetus by amniocentesis ?
- Jaundice
- Down’s syndrome
- Cystic fibrosis
- Colourblindness
Q. 21 of Quiz- (Que-ID : 3239)
The aleurone layer in maize grain is especially rich in
- auxins
- proteins
- starch
- lipids
Q. 22 of Quiz- (Que-ID : 3065)
Most of the energy of the carbohydrates is released by oxidation when
- Pyruvic acid is converted into CO2 and H2O
- Pyruvic acid is converted into acetyl Co-A
- Sugar is converted into pyruvic acid
- Glucose is converted into alcohol and CO2
Q. 1 of Quiz- (Que-ID : 2614)
Each tooth is embedded in a socket of jaw bone known as
- Thecodont
- Diphyodont
- Heterodont
- None of the above
Q. 6 of Quiz- (Que-ID : 3474)
Water co-deficient contains:
- Large thin walled cells
- Large-vacuoles
- Membrane
- All of these
Q. 10 of Quiz- (Que-ID : 3228)
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- potato
- ginger
- onion
- colocasia
Q. 25 of Quiz- (Que-ID : 3193)
Which one of the following contains the largest quantity of extra-cellular material
- Striated muscle
- Areolar tissue
- Stratified epithelium
- Myelinated nerve fibres
Q. 22 of Quiz- (Que-ID : 3465)
Animals undergo inactive stage during winters. It is called
- Acclimatisation
- Hibernation
- Aestivation
- Adapatation
Q. 6 of Quiz- (Que-ID : 3174)
Ciliated epithelium is present in
- fallopian tubes
- blood vessels
- mid brain
- none of the above
Q. 3 of Quiz- (Que-ID : 1580)
Enzymatic hydrolysis of major nutrients in GIT to yield their simpler components is .....
- Fermentation
- Deglutition
- Glycolysis
- Digestion
Q. 18 of Quiz- (Que-ID : 2686)
How many times our heart beats in a minute
- 65-59
- 70-75
- 25-45
- None of the above
Q. 5 of Quiz- (Que-ID : 2873)
Which of the following STDs are not completely curable ?
- Chlamydiasis, gonorrhoea, trichomoniasis
- Chancroid syphilis, genital warts
- AIDS, syphilis, hepatitis B
- AIDS, genital herpes, hepatitis B
Q. 20 of Quiz- (Que-ID : 2663)
RBC contains very high quantity of which enzyme
- Carbonic anhydrase
- Lysosome
- Ligase
- None of the above
Q. 10 of Quiz- (Que-ID : 3303)
“Human population grows in geometric ratio while food materials increase in arithmetic proportion”. It is a statement from
- Darwin
- Bateson
- AmartyaSen
- Malthus.
Q. 9 of Quiz- (Que-ID : 3252)
Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?
- Mammalia : give birth to young ones
- Reptilia : possess 3-chambered heart with one incompletely divided ventricle
- Chordata : possess a mouth provided with an upper and a lower jaw
- Chondrichthyes : possess cartilaginous endoskeleton
Q. 1 of Quiz- (Que-ID : 3369)
Integrated Pest Management (IPM) discourages the excessive used of
- biological methods
- chemical pesticides
- mechanical methods
- all of these
Q. 14 of Quiz- (Que-ID : 2832)
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because
- nodes are shorter than intemodes
- nodes have meristematic cells
- nodes are located near the soil
- nodes have non-photosynthetic cells.
Q. 2 of Quiz- (Que-ID : 3370)
Which of the following is not used as a biopesticide ?
- Trichoderma harzianum
- Nucleopolyhedrovirus
- Xanthomonas campestris
- Bacillus thuringiensis
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