The hormone that lowers blood calcium by depositing it in bones is: MCQ with Answer and Explanation

The hormone that lowers blood calcium by depositing it in bones is:
A. Calcitonin
B. Thyroxine
C. Insulin
D. Parathyroid hormone
Answer: Option A
Solution (By JKSSB Mock Tests)
Calcitonin, secreted by the thyroid gland, reduces blood calcium by inhibiting osteoclast activity and promoting calcium deposition in bones. Parathyroid hormone raises calcium. Thyroxine regulates metabolism, insulin lowers blood glucose.

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Practice More Biology Questions

Question #1
Consider statements about animal husbandry: 1. MOET is used for cattle improvement. 2. Artificial insemination allows the use of superior bull semen. 3. Crossbreeding reduces genetic diversity. Which are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1, 2 and 3
D. 1 and 2 only

Correct Answer: Option D


Explanation:
Multiple Ovulation Embryo Transfer (MOET) is a reproductive technology used in cattle to rapidly multiply the offspring of superior females. Artificial insemination (AI) allows farmers to use semen from genetically superior bulls without keeping the animal, improving herd quality. Crossbreeding involves mating animals of different breeds to combine desirable traits and increase heterozygosity, thereby increasing, not reducing, genetic diversity in the population. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology
Question #2
The scientific name of the Indian cobra is:
A. Ophiophagus hannah
B. Vipera russellii
C. Bungarus fasciatus
D. Naja naja

Correct Answer: Option D


Explanation:
Naja naja is the binomial name of the spectacled cobra, common in India. Vipera russellii is Russell's viper, Bungarus fasciatus is the banded krait, Ophiophagus hannah is the king cobra. Binomial nomenclature was introduced by Carolus Linnaeus to provide a universal naming system.

This question belongs to: Science Biology
Question #3
The organelle that contains enzymes for the glyoxylate cycle in plants is the:
A. Peroxisome
B. Mitochondria
C. Glyoxysome
D. Chloroplast

Correct Answer: Option C


Explanation:
Glyoxysomes are specialized peroxisomes in oil-storing seeds that contain glyoxylate cycle enzymes, converting lipids to carbohydrates during germination.

This question belongs to: Science Biology