MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 2851. |
DNA is not directly involved with the synthesis of the following [MHCET 2002] |
| A. | m-RNA |
| B. | r-RNA |
| C. | t-RNA |
| D. | Protein |
| Answer» E. | |
| 2852. |
After a mutation at a genetic locus the character of an organism changes due to the change in [CBSE PMT 2004] |
| A. | Protein synthesis pattern |
| B. | RNA transcription pattern |
| C. | Protein structure |
| D. | DNA replication |
| Answer» D. DNA replication | |
| 2853. |
Which amino acids are present in histones [Orissa JEE 2004] |
| A. | Lysine and histidine |
| B. | Valine and Histidine |
| C. | Arginine and lysine |
| D. | Arginine and histidine |
| Answer» D. Arginine and histidine | |
| 2854. |
Who discovered "Reverse transcription?? [MP PMT 1999; Pb. PMT 1999, 2000] |
| A. | Watson and Crick |
| B. | Beadle and tatum |
| C. | Temin and Baltimore |
| D. | Khorana |
| Answer» D. Khorana | |
| 2855. |
Who proposed the 'Signal hypothesis' meant for the biosynthesis of secretory type of proteins [AFMC 2000] |
| A. | Baltimore |
| B. | Camillio Golgi |
| C. | Blobel and Sabatini |
| D. | Sheeler and Bianchi |
| Answer» D. Sheeler and Bianchi | |
| 2856. |
In protein synthesis, the polymerization of amino acids involves three steps. Which of the following is not involved in protein synthesis [BHU 2000] |
| A. | Elongation |
| B. | Transcription |
| C. | Termination |
| D. | Initiation |
| Answer» C. Termination | |
| 2857. |
Transcription means synthesis of [MP PMT 1997, 98] |
| A. | DNA |
| B. | RNA |
| C. | m-RNA |
| D. | t-RNA |
| Answer» D. t-RNA | |
| 2858. |
Which of the following step of translation does not consume a high energy phosphate bond [CBSE PMT 1997] |
| A. | Translocation |
| B. | Amino acid activation |
| C. | Peptidyl transferase reaction |
| D. | Aminoacyl tRNA binding to A-site |
| Answer» B. Amino acid activation | |
| 2859. |
RNA which carry amino acid from the cytoplasm to the ribosome is |
| A. | m-RNA |
| B. | t-RNA |
| C. | r-RNA |
| D. | c-RNA |
| Answer» C. r-RNA | |
| 2860. |
Transcription is a process by which [MP PMT 1994, 2002; Manipal 1995] |
| A. | Amino acids are joined to form polypeptides |
| B. | An RNA molecule is synthesized on a DNA template |
| C. | An RNA molecule is synthesized within a ribosome |
| D. | Two daughter strands of DNA are synthesized |
| Answer» C. An RNA molecule is synthesized within a ribosome | |
| 2861. |
'Central Dogma' was proposed by [RPMT 1995] |
| A. | Crick |
| B. | Beadle and Tatum |
| C. | Temin and Baltimore |
| D. | Klug |
| Answer» B. Beadle and Tatum | |
| 2862. |
Which of the following is genetically inert and does not transcribe messenger RNA for protein synthesis |
| A. | DNA of euchromatin |
| B. | DNA of heterochromatin |
| C. | DNA of euchromatin and heterochromatin |
| D. | None of the above |
| Answer» C. DNA of euchromatin and heterochromatin | |
| 2863. |
Translation is called [BHU 1987; CPMT 1996; MP PMT 2001] |
| A. | Formation of RNA from DNA |
| B. | Formation of DNA from DNA |
| C. | Formation of DNA from RNA |
| D. | Protein formation |
| Answer» E. | |
| 2864. |
Streptomycin and related antibiotics bind to small sub-units of ribosomes in prokaryotes and they |
| A. | Inhibit protein synthesis |
| B. | Block the action of peptidyl transferase |
| C. | Cause misreading of the genetic codes |
| D. | Cause point mutation |
| Answer» B. Block the action of peptidyl transferase | |
| 2865. |
It has been found in many cells that ribosomes occur in chains along mRNA molecules. What is the advantage of this arrangement as compared to a situation in which ribosomes occur singly |
| A. | Fewer tRNA molecules are used in protein synthesis |
| B. | Polypeptides can be produced more easily |
| C. | A greater variety of polypeptides can be produced |
| D. | Probability of gene mutation occurring is less |
| Answer» C. A greater variety of polypeptides can be produced | |
| 2866. |
If a certain group of cells utilise the amino acid glycine exclusively for protein synthesis, and if a growing culture of these cells is fed radioactive glycine, radioactivity will be found first in the |
| A. | Ribosomes |
| B. | tRNA |
| C. | mRNA |
| D. | Mitochondria |
| Answer» C. mRNA | |
| 2867. |
One strand of the given segment of DNA codes for mRNA having the sequence AUC, GCG, UCA needed for synthesis of proteins. The strand by which DNA molecule will be responsible for the above mRNA sequence is |
| A. | \[\underset{TAG}{\mathop{\underset{|}{\mathop{ATC}}\,}}\,\,\,\,\,\underset{CGG}{\mathop{\underset{|}{\mathop{GCC}}\,}}\,\,\,\,\,\underset{TAG}{\mathop{\underset{|}{\mathop{ATU}}\,}}\,\] |
| B. | \[\underset{TCT}{\mathop{\underset{|}{\mathop{AGA}}\,}}\,\,\,\,\underset{CGC}{\mathop{\underset{|}{\mathop{GCG}}\,}}\,\,\,\,\underset{CTA}{\mathop{\underset{|}{\mathop{GAT}}\,}}\,\] |
| C. | \[\underset{ACT}{\mathop{\underset{|}{\mathop{TGA}}\,}}\,\,\,\,\underset{GCG}{\mathop{\underset{|}{\mathop{CGC}}\,}}\,\,\,\,\underset{ATC}{\mathop{\underset{|}{\mathop{TAG}}\,}}\,\] |
| D. | \[\underset{ATC}{\mathop{\underset{|}{\mathop{TAG}}\,}}\,\,\,\,\underset{GCG}{\mathop{\underset{|}{\mathop{CGC}}\,}}\,\,\,\,\underset{TCA}{\mathop{\underset{|}{\mathop{AGT}}\,}}\,\] |
| Answer» E. | |
| 2868. |
A polypeptide of five amino acids is synthesized during protein synthesis in eukaryotic cells. Which one of the following can be the correct polypeptide |
| A. | Glycine - valine - methionine - histidine - lysine |
| B. | Methionine - glycine - histidine - lysine - valine |
| C. | Valine - methionine - glycine - histidine - lysine |
| D. | Histidine - lysine - methionine - valine - glycine |
| Answer» C. Valine - methionine - glycine - histidine - lysine | |
| 2869. |
In a cell, protein synthesis occurs by the linking together of amino acids. The base sequence of mRNA defines the primary structure of proteins because |
| A. | Amino acid molecules align directly on the polynucleotide of mRNA |
| B. | It determines the order of alignment of amino acid charged tRNA molecule |
| C. | There is one to one coding relationship between each base on the mRNA and each amino acid |
| D. | Each amino acid is defined by a pair of bases on the mRNA |
| Answer» C. There is one to one coding relationship between each base on the mRNA and each amino acid | |
| 2870. |
If in a test tube, mRNA of E. coli cells and tRNAs from the body of rats are taken and sufficient number of amino acids are put, then the polypeptide synthesized will be of the nature of |
| A. | Rat body cells |
| B. | E. coli cells |
| C. | Both E. coli and rat body cells |
| D. | Polypeptide synthesis will not occur |
| Answer» C. Both E. coli and rat body cells | |
| 2871. |
Synthesis of any protein in a cell determines [CPMT 1988] |
| A. | Types of ribosomes |
| B. | Mitochondria |
| C. | Sequence of nucleotides in DNA |
| D. | Suger and phosphate of DNA |
| Answer» D. Suger and phosphate of DNA | |
| 2872. |
The process by which DNA of nucleus passes genetic information to mRNA [AIIMS 1980, 81; DPMT 1986; MP PMT 1984] |
| A. | Translocation |
| B. | Transcription |
| C. | Translation |
| D. | Transportation |
| Answer» C. Translation | |
| 2873. |
Ranikhet disease is found in [MP PMT 1995] |
| A. | Honey bee |
| B. | Hens |
| C. | Fishes |
| D. | Pigs |
| Answer» C. Fishes | |
| 2874. |
Cause of fatty liver syndrome in poultry is |
| A. | Parasite |
| B. | High temperature |
| C. | Lack of \[{{O}_{2}}\] |
| D. | Cage system |
| Answer» E. | |
| 2875. |
Birds specially chicken grown for meat only is known as [MP PMT 1994] |
| A. | Hybrid |
| B. | Broiler |
| C. | Bird management |
| D. | Bird culture |
| Answer» C. Bird management | |
| 2876. |
Induced egg laying is due to the injection of |
| A. | Egg extract in the body |
| B. | Egg extract orally |
| C. | Pituitary extract in the body |
| D. | Ovary extract in the body |
| Answer» D. Ovary extract in the body | |
| 2877. |
Maximum fat contents are present in the meat of |
| A. | Pork |
| B. | Mutton |
| C. | Beef |
| D. | Chicken |
| Answer» D. Chicken | |
| 2878. |
Main product of poultry is |
| A. | Eggs |
| B. | Chicken |
| C. | Meat |
| D. | Eggs and meat |
| Answer» E. | |
| 2879. |
One of the following is a disease of poultry [KCET 2004] |
| A. | Abdominal gland |
| B. | Salivary gland |
| C. | Anthrax |
| D. | Ranikhet |
| Answer» E. | |
| 2880. |
Laghorn hen lays how many eggs in a year |
| A. | 8 |
| B. | 80 |
| C. | 800 |
| D. | 220 |
| Answer» E. | |
| 2881. |
Poultry includes |
| A. | Fowl, duck, tortoise and turkey |
| B. | Fowl, duck, pigeon and tortoise |
| C. | Duck, fowl, tortoise and turtle |
| D. | Fowl, duck, turkey and pigeon |
| Answer» E. | |
| 2882. |
Population of India in early 21st century may be |
| A. | 105 crore |
| B. | 125 crore |
| C. | 95 crore |
| D. | 155 crore |
| Answer» B. 125 crore | |
| 2883. |
Ratio of birth and death rates according to 1991 census is |
| A. | 1.21666666666667 |
| B. | 1.38472222222222 |
| C. | 36 : 15 |
| D. | 37 : 9 |
| Answer» C. 36 : 15 | |
| 2884. |
Highest and lowest population in India is in |
| A. | M.P. and Tripura |
| B. | U.P. and Sikkim |
| C. | Maharashtra and Nagaland |
| D. | Andhra Pradesh and Assam |
| Answer» C. Maharashtra and Nagaland | |
| 2885. |
Which of the following is the most sparsely populated state of India [BHU 2004] |
| A. | Manipur |
| B. | Rajasthan |
| C. | Meghalaya |
| D. | Arunachal Pradesh |
| Answer» E. | |
| 2886. |
Developing country having high death rate is |
| A. | India |
| B. | Bangladesh |
| C. | Pakistan |
| D. | Nepal |
| Answer» B. Bangladesh | |
| 2887. |
Certain characteristic demographic features of developing countries are [CBSE PMT 2004] |
| A. | High infant mortality, low fertility uneven population growth and a very young age distribution. |
| B. | High mortality, high density, uneven population growth and a very old age distribution. |
| C. | High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution. |
| D. | High fertility, high density, rapidly rising mortality rate and a very young age distribution. |
| Answer» D. High fertility, high density, rapidly rising mortality rate and a very young age distribution. | |
| 2888. |
The present population of world is about [CBSE PMT 1997] |
| A. | 500 million |
| B. | 100 million |
| C. | 15 trillion |
| D. | 6 billion |
| Answer» E. | |
| 2889. |
According to 1991 census, rural population of India is |
| A. | 0.7 |
| B. | 0.76 |
| C. | 0.41 |
| D. | 0.57 |
| Answer» C. 0.41 | |
| 2890. |
Sex ratio in a species indicates the numerical relation between the number of [MP PMT 1995] |
| A. | Male and female producing gametes |
| B. | Blacks and whites |
| C. | Unisexual and bisexual |
| D. | None of the above |
| Answer» E. | |
| 2891. |
Presently, the world population doubles after every |
| A. | 15 years |
| B. | 20 years |
| C. | 30 years |
| D. | 35 years |
| Answer» E. | |
| 2892. |
Total population of the world till the end of 20th century will become |
| A. | \[5\times {{10}^{9}}\] |
| B. | \[5.35\times {{10}^{9}}\] |
| C. | \[7.5\times {{10}^{9}}\] |
| D. | \[6\times {{10}^{9}}\] |
| Answer» D. \[6\times {{10}^{9}}\] | |
| 2893. |
According to the population of different states of India, Madhya Pradesh is placed at which position |
| A. | Fourth |
| B. | Fifth |
| C. | Sixth |
| D. | Seventh |
| Answer» E. | |
| 2894. |
Per year growth in India's population according to 1991 census is |
| A. | 0.0222 |
| B. | 0.0223 |
| C. | 0.0211 |
| D. | 0.0213 |
| Answer» C. 0.0211 | |
| 2895. |
The country having negative population growth rate is |
| A. | Germany |
| B. | France |
| C. | Sweden |
| D. | America |
| Answer» B. France | |
| 2896. |
The population growth rate is maximum in |
| A. | Singapore |
| B. | India |
| C. | Pakistan |
| D. | Bangladesh |
| Answer» D. Bangladesh | |
| 2897. |
The population growth of India from 1981 to 1991 is |
| A. | 0.2475 |
| B. | 0.2341 |
| C. | 0.2375 |
| D. | 0.2441 |
| Answer» C. 0.2375 | |
| 2898. |
In the population of world, how many persons are added per year |
| A. | 4.11 crores |
| B. | 5.5 crores |
| C. | 8 crores |
| D. | 10 crores |
| Answer» D. 10 crores | |
| 2899. |
According to the population of world, India is placed at |
| A. | First |
| B. | Second |
| C. | Third |
| D. | Fourth |
| Answer» C. Third | |
| 2900. |
Population density of India is |
| A. | 215/sq. km |
| B. | 200/sq. km |
| C. | 400/sq. km |
| D. | None of the above |
| Answer» E. | |