Endocrinology

In the process of binary fission in Euglena, the division involves the splitting of the organism into two daughter cells, and each daughter cell develops a new flagellum. However, the two statements provided are incorrect, as explained below:

• Statement I: "In binary fission, two daughter Euglena develop new flagella individually." This is false because, during binary fission in Euglena, the flagellum is divided, and the process of flagellum formation in both daughter cells happens differently, not individually as stated. Both daughter cells inherit part of the flagellum or its basal body, and no new flagellum develops separately.
• Statement II: "Longitudinal binary fission is seen in Euglena." This is false because the binary fission process in Euglena is indeed longitudinal. In longitudinal binary fission, the organism divides along the long axis. However, the statement is not well-phrased, making it incorrect as it does not specify that both flagella division and cellular division occur longitudinally along the axis of the organism.

Since both statements are false, the correct answer is Option (B).

Let's evaluate each of the statements:

1. The use of amniocentesis was banned in 1970: This is incorrect. The use of amniocentesis was not banned in 1970. It remains a commonly used prenatal genetic testing procedure, although its misuse for sex determination was banned in some countries. Statement I is incorrect.
2. Cervical cancer was caused by Herpes Simplex Virus: This is incorrect. Cervical cancer is primarily caused by persistent infection with high-risk strains of the Human Papillomavirus (HPV), not by Herpes Simplex Virus. Statement II is incorrect.
3. Copper-bearing IUDs and progestogen are emergency contraceptives: This is partially incorrect. Copper-bearing IUDs can be used as emergency contraception, but progestogen-based contraceptives (such as levonorgestrel pills) are used for regular contraception and are sometimes available as emergency contraceptives. However, the generalization is misleading. Statement III is incorrect.
4. A 3D cross-sectional picture in a CAT scan is called a tomogram: This is correct. The 3D image generated by a CAT (Computed Axial Tomography) scan is indeed referred to as a tomogram. Statement IV is correct.

Conclusion: The incorrect statements are II and III. Therefore, the correct answer is Option B.

Correct Analysis of Classification

• Crustacea (I): Crustaceans possess green glands for excretion. Balanus belongs to this class. ✔ (Correct)
• Insecta (IV): Insects have three pairs of jointed legs. Leptima is an insect. ✔ (Correct)

Thus, the correct answer is Option (D).

Caspases are a family of enzymes that play an essential role in programmed cell death (apoptosis). They help in the breakdown of infected or damaged cells. Caspases activate the process of apoptosis, ensuring the elimination of infected or abnormal cells, making them key in immune responses.

Lysozymes are enzymes that break down the cell walls of bacteria, but they do not directly contribute to the destruction of infected cells. They play an important role in the immune system but act more as an antimicrobial agent.

Colostrum is the first milk produced by mammals after giving birth, rich in antibodies, but it does not directly help in the destruction of infected cells.

Interferons are proteins produced by cells in response to viral infections, and while they help modulate the immune response and inhibit virus replication, they do not directly destroy infected cells.

Conclusion: The correct answer is Option A: Caspases.

- Sewall Wright effect is a concept in population genetics, where the change in gene frequency within a small population occurs by chance (genetic drift), rather than by natural selection. In small populations, random changes in allele frequencies are more significant, and this leads to the genetic diversity observed in isolated populations.

Thus, the correct answer is Option B, the Sewall Wright effect.

Correct Book Authored by John Ray

• A: Natural History was written by Pliny the Elder, not John Ray. (❌ Incorrect)
• B: Systema Naturae was authored by Carolus Linnaeus, not John Ray. (❌ Incorrect)
• C: Origin of Species was written by Charles Darwin, not John Ray. (❌ Incorrect)
• D: Historia Generalis Plantarum was written by John Ray. (✔ Correct)

Thus, the correct answer is (D).

Genome Sequencing and Related Terms

• Sequence Annotation: This refers to the process of identifying and marking functional elements within a genome, including both coding (genes) and non-coding regions. It involves determining the locations of genes and their functions. Correct.
• Single Nucleotide Polymorphism (SNP): This refers to variations in a single nucleotide that occur at specific positions in the genome. It is a type of genetic variation but does not involve sequencing the entire genome. Incorrect.
• Expressed Sequence Tags (ESTs): These are short sequences derived from mRNA that represent expressed genes in a genome. They are used for gene discovery but do not cover the entire genome. Incorrect.
• Restriction Fragment Length Polymorphism (RFLP): This is a method used to analyze genetic variation by detecting differences in DNA fragment sizes after digestion with restriction enzymes. It is not related to sequencing the entire genome. Incorrect.

Conclusion: The correct answer is Option A, which refers to Sequence Annotation.