Biology Ch 6 Class 12 Chromosomes and DNA
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Evolutionary relationship among species are reflected in their ________.
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Which statement correctly describes the transcription of DNA?
PMC 2020BiologyChromosomes and DNAElimination Tool:
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Which of the following statements correctly describes homologous chromosomes?
NTS 2016 DUHS & JSMUBiologyChromosomes and DNAElimination Tool:
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An individual has an additional sex chromosome. Which syndrome does he have?
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Locus is defined as:
NUMS 2019 ReconductBiologyChromosomes and DNAElimination Tool:
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The biochemical analysis of a sample of DNA shows that 32% of the nitrogenous bases are cytosine. What is the total % of adenine and uracil in RNA transcribed from this DNA?
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Who discovered DNA?
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Mutations can occur in:
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Part of the amino acid sequences In normal and sickle cell hemoglobin are shown.
Normal haemoglobin
Thr – pro – glu – glu
Sickle cell haemoglobin
thr – pro – val – glu
mRNA codons for these amino acids are
Glutamine (glu) GAA GAG
Threonine (thr) ACU ACC
Proline (pro) CCU CCC
Valine (val) GUA GUG
Which transfer RNA molecule is Involved in the formation of this part of the sickle cell haemoglobin?
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The sequence of nucleotides that determines the amino acid sequence of a protein is
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Chromosome is made of
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In Maxam – Gilbert method, DNA threads are:
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The diploid human chromosome set has:
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The chromosomes with equal arms are called:
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What will be the approximate length of a DNA strand having 500 nucleotides?
HIDE ELIMINATED OPTIONS
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Bacteria were grown in a medium containing heavy isotope of nitrogen (N15) for many generations and all their DNA contained many heavy nitrogen only. A bacterium of this type was transferred to normal medium and allowed to duplicate. After two divisions of heavy DNA is likely to be that:
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Which of the following can be blocked, if one wants to stop translation of mRNA?
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DNA contains
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Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called
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Which of the following RNA sequences would be transcribed from the DNA sequence ATGGCTAGGAC?
NTS 2017BiologyChromosomes and DNAElimination Tool:
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An anticodon is the sequence of the nitrogenous bases on the:
NTS 2014BiologyChromosomes and DNAElimination Tool:
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Rate of DNA replication by DNA polymerase is
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Within the chromosomes, each chromatid contains ______ DNA molecule:
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Haploid and monoploid numbers of chromosomes of hexaploid wheat are:
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Phenylketonuria is
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Chromosomes are composed of
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Highly condensed portions of the chromatin are called:
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During DNA replication ______ attaches the fragment to the lagging strand.
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The true E.Coli replicating enzyme is
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The Meselson and Stahl experiment confirmed that DNA replicates in _____ manner.
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The genotype of a normal male in humans is ______ chromosomes.
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Phenotype is:
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Histones have abundance of amino acids
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DNA has a helical shape with the diameter of
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“Law of independent assortment” states:
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Which of the following enzymes is used to join DNA fragments?
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Which statement is correct?
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The number of base pairs in a complete helical turn is/are:
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A fern has _____ pairs of chromosomes.
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Diameter of DNA double helix is:
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In a typical nucleotide, the nitrogenous base is attached to _______ carbon of pentose sugar.
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A tortion of chromatin that is condensed only during cell division is
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Transcription is the process in which an RNA copy of the DNA sequence and coding the gene is produced with the help of an enzyme called:
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Which is incorrect?
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Genetic code is a ______ code and out of 64 codons, _____ are nonsense codons.
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Y chromosome in humans:
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What is the effect of enzyme DNA ligase?
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What would be the number of nucleotides for a protein molecule of about 142 amino acids?
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Particular array of chromosomes that an individual processes is called its:
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Gene mutations take place in:
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In alkaptonuria
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The length of okazaki fragments in eukayotes is
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The particular array of chromosomes that an individual possesses is called its:
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The combination of XXY (47) chromosomes results in:
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Genetic information in the DNA is encoded as:
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Central dogma is
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In DNA A.
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Which of the following is NOT the part of RNA?
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In semi-conservative replication
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A typical human chromosome contains _________ nucleotides in its DNA
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The total of all the alleles in a population is called a:
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The phenomenon known as crossing-over occurs during:
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Ali Durrani
