Rosie, the first transgenic cow, was engineered to produce human: MCQ with Answer and Explanation

Rosie, the first transgenic cow, was engineered to produce human:
A. Insulin
B. Growth hormone
C. Interferon
D. Alpha-lactalbumin
Answer: Option D
Solution (By JKSSB Mock Tests)
Rosie, the first transgenic cow, was created in 2000. She was genetically modified to produce milk that contained human alpha-lactalbumin, a protein found in human breast milk. Her milk was nutritionally more balanced for human babies than normal cow's milk, containing about 2.4 grams per liter of this human protein. This demonstrated the potential of transgenic animals for producing pharmaceutical or nutritional products.

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Practice More Biology Questions

Question #1
Who was the first scientist to view live sperm cells and bacteria under a microscope?
A. Robert Koch
B. Antonie van Leeuwenhoek
C. Louis Pasteur
D. Robert Hooke

Correct Answer: Option B


Explanation:
Antonie van Leeuwenhoek, using his hand-crafted single-lens microscopes, was the first to observe and describe living sperm cells, bacteria, protozoa, and red blood cells in the 1670s. Hooke saw dead cork cells, Pasteur and Koch later advanced microbiology with germ theory and pure culture techniques.

This question belongs to: Science Biology
Question #2
The vitamin that prevents neural tube defects during fetal development is:
A. Folic acid (B₉)
B. Vitamin B₁
C. Vitamin B₁₂
D. Vitamin C

Correct Answer: Option A


Explanation:
Folic acid is crucial for DNA synthesis and cell division; deficiency during early pregnancy increases risk of neural tube defects like spina bifida. Supplementation is recommended. B₁ is for carbohydrate metabolism, B₁₂ for nerve function, C for collagen.

This question belongs to: Science Biology
Question #3
The primary xylem in roots is:
A. Mesarch
B. Exarch
C. Endarch
D. Centrarch

Correct Answer: Option B


Explanation:
In roots, the protoxylem (first formed xylem) lies towards the periphery and metaxylem towards the centre; this arrangement is called exarch. In stems, protoxylem is towards the centre, called endarch. Exarch condition is typical of roots. Mesarch is found in ferns. This arrangement aids in understanding anatomical differences between root and stem.

This question belongs to: Science Biology