Find the correct statements:
Choose the correct answer from the options given below:
| A. | In human pregnancy, the major organ systems are formed at the end of 12 weeks. |
| B. | In human pregnancy, the major organ systems are formed at the end of 8 weeks. |
| C. | In human pregnancy, the heart is formed after one month of gestation. |
| D. | In human pregnancy, limbs and digits develop by the end of the second month. |
| E. | In human pregnancy, the appearance of hair is usually observed in the fifth month. |
| 1. | B, C, D and E only |
| 2. | A, C, D and E Only |
| 3. | A and E Only |
| 4. | B and C Only |
Subtopic: Fetal Development & Parturition |
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Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
| 1. | The were conceived through in vitro fertilization. |
| 2. | They have 75% identical genetic content. |
| 3. | They are monozygotic twins. |
| 4. | They are fraternal twins. |
Subtopic: Fertilization | oogenesis |
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What are the potential drawbacks in adoption of the IVF method?
Choose the correct answer from the options given below:
| A. | High fatality risk to mother |
| B. | Expensive instruments and reagents |
| C. | Husband/wife necessary for being donors |
| D. | Less adoption of orphans |
| E. | Not available in India |
| F. | Possibility that the early embryo does not survive |
| 1. | A, B, C, D only | 2. | A, B, C, E, F only |
| 3. | B, D, F only | 4. | A, C, D, F only |
Subtopic: Infertility |
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Genes R and Y follow independent assortment. If RRYY produce round yellow seed and rryy produce wrinkled green seeds, what will be then phenotypic ratio of the F2 generation?
1. Phenotypic ratio - 9 : 3 : 3 : 1
2. Phenotypic ratio - 9 :7
3. Phenotypic ratio - 1 : 2 : 1
4. Phenotypic ratio - 3 : 1
1. Phenotypic ratio - 9 : 3 : 3 : 1
2. Phenotypic ratio - 9 :7
3. Phenotypic ratio - 1 : 2 : 1
4. Phenotypic ratio - 3 : 1
Subtopic: Dihybrid Cross Analysis |
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What is the pattern of inheritance for polygenic traits?
| 1. | Autosomal dominant pattern |
| 2. | X-linked recessive inheritance pattern |
| 3. | Mendelian inheritance pattern |
| 4. | Non-Mendelian inheritance pattern |
Subtopic: Polygenic Inheritance & Pleiotropy |
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With the help of the given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in \(F_3\) generation.
| 1. | 1/8 | 2. | Zero |
| 3. | 1/4 | 4. | 1/2 |
Subtopic: Pedigree Analysis: Problem Solving |
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Histones are enriched with
1. Phenylalanine & Leucine
2. Phenylalanine & Arginine
3. Lysine & Arginine
4. Leucine & Lysine
1. Phenylalanine & Leucine
2. Phenylalanine & Arginine
3. Lysine & Arginine
4. Leucine & Lysine
Subtopic: DNA Packaging |
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Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I | List-II | ||
| A. | Alfred Hershey and Martha Chase | I. | Streptococcus pneumoniae |
| B. | Euchromatin | II. | Densely packed and dark- stained |
| C. | Frederick Griffith | III. | Loosely packed and light-stained |
| D. | Heterochromatin | IV. | DNA as genetic material confirmation |
| 1. | A-IV, B-III, C-I, D-II | 2. | A-III, B-II, C-IV, D-I |
| 3. | A-II, B-IV, C-I, D-III | 4. | A-IV, B-II, C-I, D-III |
Subtopic: Miscellaneous |
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Given below are two statements :
| Statement I : | In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable. |
| Statement II : | DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism. |
| 1. | Statement I is correct but Statement II is incorrect |
| 2. | Statement I is incorrect but Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: RNA world |
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Which of the following are the post-transcriptional events in an eukaryotic cell?
Choose the correct answer from the options given below:
| A. | Transport of pre-mRNA to the cytoplasm prior to splicing |
| B. | Removal of introns and joining of exons. |
| C. | Addition of methyl group at 5' end of hnRNA. |
| D. | Addition of adenine residues at 3' end of hnRNA. |
| E. | Base pairing of two complementary RNAs. |
| 1. | B, C, E only | 2. | C, D, E only |
| 3. | A, B, C only | 4. | B, C, D only |
Subtopic: Transcription |
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