Download App

Reproductive Health — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYReproductive Health1 Mark
MCQ
For two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: $\text{PCR, ELISA, DNA}$ hybridisation are confirmatory tests for sexually transmitted diseases.
Reason: Incidence of $\text{STDs}$ are very high in persons above the age of $30.$
  • A
    Both assertion and reason are true, and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • ✓
    Assertion is true, but reason is false.
  • D
    Both assertion and reason are false.
✓

Answer

Correct option: C.
Assertion is true, but reason is false.
$\text{STDs}$ are a major threat to healthy society. Incidence of $\text{STDs}$ is very high in persons who have $15-24$ years of age.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion (A) & Reason (B) MCQ" from Reproductive Health→Reproductive Health — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Read the following and answer any four questions from $(i)$ to $(v)$ given below:
The endosperm makes the main source of food for the embryo. Generally the endosperm nucleus divides after the division of the oospore, but in several cases the endosperm is formed to a great extent even before the first division of the oospore. There are three general types of endosperm formation: $(a)$ nuclear type, $(b)$ cellular type and $(c)$ helobial type. The endosperm is usually triploid, but haploid endosperm is also found. Endosperm may either be completely consumed by the developing embryo before seed maturation, or it may persist in the mature seed.
  1. Haploid endosperm is found in :
  1. Pin us.
  2. Cauliflower.
  3. Sunflower.
  4. Pea.
  1. Persistent endosperm is found in:
$P$. Pea $Q$. Castor $R$. Bean $S.$ Coconut $T$. Groundnut.
  1. $Q$ and $S$.
  2. $P$ and $T$.
  3. $R, S$ and $T$.
  4. $P, S$ and $T$.
  1. Milk of tender coconut represents $(A)$ and the surrounding white coconut meal represents $(B).$
S. No
$A$
$B$
$(a)$
Cellular endosperm
Free- nuclear endosperm
$(b)$
Free $-$ nuclear endosperm
Cellular endosperm
$(c)$
Helobial endosperm
Cellular endosperm
$(d)$
Free-nuclear endosperm
Helobial endosperm
  1. If an endosperm cell of a gymnosperm contains $12$ chromosomes, the number of chromosomes in each cell of the root will be:
  1. $4$
  2. $24$
  3. $16$
  4. $6$
  1. In angiosperms, normally after fertilization:
  1. The zygote divides earlier than the primary endosperm nucleus.
  2. The primary endosperm nucleus divides earlier than the zygote.
  3. Both the zygote and primary endosperm nucleus divide simultaneously.
  4. Both the zygote and primary endosperm nucleus undergo a resting period.
→
For question two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: Pure lines are called true breed.
Reason: True breeds are used for cross breeding.
→
For question two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: The soil profiles of grassland, forest and desert biomes differ from each other.
Reason: Soil profile develops due to weathering process, accumulation of organic matter and leaching of mineral matter.
→
Transgenic plants are developed by :
→
For two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: Enterobiasis is a sexually transmitted disease caused by pinworm.
Reason: Enterobiasis is treated with antihelminthic drugs.
→
For question two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: Mendel was successful in his hybridisation experiments.
Reason: Garden pea proved to be an ideal experimental material.
→
For two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: In $\text{GIFT},$ fertilisation takes place in vivo.
Reason: The results of $\text{GIFT}$ are less better than in vitro fertilisation.
→
For question two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: Alpha diversity refers to species diversity present in a given community or habitat.
Reason: Alpha diversity is expressed by species richness and species evenness in a community or habitat.
→
For question two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion : In birds, the chromosome composition of the egg determines the sex.
Reason: Female birds are heterogametic.
→
For question two statements are given $-$ one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion : No two species can occupy the same ecological niche in a habitat.
Reason : A habitat can contain only one ecological niche.
→