Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology a healthy diet minerals and vitamins nutrition and diet role of various nutrients

Predominant form of lipid present in biomembranes

  1. Free fatty acids

  2. Cholesterol

  3. Triacylglycerols

  4. Phospholipids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The predominant lipids present in the biomembrane are phospholipids, having a polar water soluble phosphorous head and a non polar long aliphatic tail. The polar head is exposed on the surface while the hydrophobic tail remains buried inside.

Multiple choice biology a healthy diet minerals and vitamins nutrition and diet role of various nutrients

Death of intestinal bacteria will cause

  1. Blindness

  2. Tired feeling

  3. Reduced synthesis of B-complex and K-vitamins

  4. Reduced excretion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Intestinal bacteria are responsible for the synthesis of several essential vitamins, including B-complex vitamins and Vitamin K. Their death or depletion leads to a deficiency in these nutrients.

Multiple choice biology a healthy diet minerals and vitamins nutrition and diet role of various nutrients

Which one is correct matching for vitamin, its nature and deficiency disease

  1. Vitamin A Fat soluble Night blindness

  2. Vitamin K - Fat soluble Beri-beri

  3. Vitamin A Fat soluble Beri-beri

  4. Vitamin K Water soluble Pellagra
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vitamin A is fat-soluble and its deficiency causes night blindness. Vitamin K is also fat-soluble, but its deficiency is related to blood clotting issues, not beri-beri.

Multiple choice biology a healthy diet minerals and vitamins nutrition and diet role of various nutrients

Which group of three of following statements (1 5) contains all the three statements regarding beri-beri
1. A crippling disease prevalent among the native population of Africa
2. A deficiency disease caused by lack of thiamine
3. A nutritional disorder in infants and young children
4. Occurs in those countries where the staple diet is polished rice
5. The symptoms are pain from neutritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure

  1. 2, 4, 5

  2. 1, 2, 4

  3. 1, 3, 5

  4. 2, 3, 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Beri-beri is caused by thiamine deficiency (2), occurs in populations relying on polished rice (4), and presents with symptoms like neuritis, paralysis, and heart failure (5).

Multiple choice biology life processes: reproduction, growth and development different types of reproduction reproductive health of humans need of family planning

From the names given in the above box how many are not associated with asexual reproduction? 

$\boxed {\begin{matrix} Zoospore, & Conidia, & Tuber, \ Offset. & Pollen & Zygote  \end{matrix}} $

  1. Three

  2. Two

  3. Four

  4. One
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tuber, Offset and Conidia are asexual spores while Zoospore, Pollen and Zygote are sexually produced.

So, the correct option is 'Three'.

Multiple choice biology life processes: reproduction, growth and development different types of reproduction reproductive health of humans need of family planning

If amount of DNA in sperm cell is 10 picogram, then what will be amount in microsporocyte in an phase of the cell cycle?

  1. 10 pg

  2. 20 pg

  3. 80 pg

  4. 40 pg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Microsporocytes, which are diploid cells capable of undergoing meiosis to form a tetrad (four joined cells) of haploid microspores. The microspores become pollen grains and may eventually separate.
  • As we know the sperm(or male gametes) are haploid. The amount of DNA in this gametes is 10 picogram. Therefore, the amount of DNA in microsporocyte will be double i.e, 20 picograms.

So, the correct answer is " 20 pg ". 

Multiple choice biology life processes: reproduction, growth and development different types of reproduction reproductive health of humans need of family planning

Assertion : Asexual reproduction is also called blastogenesis.

Reason : In asexual reproduction there is no formation and fusion and fusion of gametes.

  1. Both Assertion and Reason are true and Reason is a correct explanation of Assertion

  2. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion

  3. Assertion is true but Reason is false

  4. Both Assertion and Reason are false

  5. Assertion is false but reason is true.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Development of an organism from non-sexual reproductive units like buds fragments etc is called blastogenesis. In asexual reproduction there is no formation and fusion of gametes.

Multiple choice biology life processes: reproduction, growth and development different types of reproduction reproductive health of humans need of family planning

The uniparental reproduction is called _______ reproduction while biparental reproduction is termed _________ reproduction. Higher organisms mostly show ________ reproduction.

  1. Sexual, asexual, sexual

  2. Asexual, sexual, asexual

  3. Asexual, sexual, sexual

  4. Sexual, asexual, asexual
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Asexual reproduction is a type of reproduction which involves a single parent. The offsprings are genetically identical to each other and to the parent. All prokaryotes and some eukaryotes reproduce this way. Sexual reproduction involves two parents. In sexual reproduction, parents produce reproductive cells—called gametes—that unite to form an offspring. Sexual reproduction is by far the most common life cycle in eukaryotes, for example, animals and plants.

Thus, the correct option is 'Asexual, sexual, sexual.'

Multiple choice biology life processes: reproduction, growth and development different types of reproduction reproductive health of humans need of family planning

Why asexual reproduction is sometimes disadvantageous?

  1. It allows animals that do not move around to produce offspring without finding mates

  2. It allows an animal to produce many offspring quickly

  3. It saves the time and energy of gamete production

  4. It produces genetically uniform populations
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes. It produces genetically uniform populations.

So, the correct option is 'Option D'.