Biology Test 131

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Biology Test 131

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Weekly Quiz Competition

Question 1
4 / -1

Both the kidneys and the contractile vacuoles of the amoeba have a similar function in:

A
Expelling out glucose

B
Expelling out salts

C
Expelling out excess water

D
Expelling out minerals

Solution

Contractile vacuoles are present in single-celled organisms like an amoeba. Contractile vacuoles are excretory and osmoregulatory in function. Hence both kidney and contractile vacuole are analogous as they both have a similar function i.e excretion or expelling out excess water.

Hence, the correct option is (C).
Question 2
4 / -1

Which of the following is the correct pathway when nerves respond to stimuli?

A
Pin pricked → Receptor → Sensory neurone → Relay neurone → Motor neurone → Effector → Response

B
Pin pricked → Effectors → Sensory neuron → Motor neuron → CNS → Receptor

C
Pin pricked → Receptors → Relay neuron → CNS → Motor neuron → Sensory neuron → Effector

D
Pin pricked → Receptor → Relay neuron → Sensory neuron → CNS → Motor neuron → Effector

Solution

Three types of neurons are required to transmit information via the stimulus-response pathway: Sensory neurons transmit information from sensory receptors to the central nervous system (CNS) Relay neurons (interneurons) transmit information within the CNS as part of the decision-making process. Therefore, firstly the system starts from pinpricked to receptor then relay neuron, sensory neuron, CNS, Motor neuron and then the effector. Correct order is: Pin pricked → Receptor → Sensory neurone → Relay neurone → Motor neuron → Effector → Response.

Hence, the correct option is (A).
Question 3
4 / -1

Which of the following statements is/are correct about cytokinins?

(a) They control the plant's response to light and gravity.

(b) They are responsible for the elongation of shoots of various plants.

(c) They delay the aging of leaves.

A
Only (a)

B
Both (a) and (b)

C
Only (b)

D
Only (c)

Solution

Cytokinins have specific effects on cytokinesis and were discovered as kinetin (a modified form of adenine, a purine) from the autoclaved herring sperm DNA. Kinetin does not occur naturally in plants. Search for natural substances with cytokinin-like activities led to the isolation of zeatin from corn-kernels and coconut milk. Since the discovery of zeatin, several naturally occurring cytokinins, and some synthetic compounds with cell division promoting activity, have been identified. Natural cytokinins are synthesized in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits, etc. It helps to produce Apical dominance in plants:

(a) A plant with apical bud intact.

(b) A plant with apical bud removed Note the growth of lateral buds into branches after decapitation. leaves, chloroplasts in leaves, lateral shoot growth, and adventitious shoot formation.

Cytokinins help overcome apical dominance. They promote nutrient mobilization which helps in the delay of leaf senescence mean ageing of plants.

Hence, the correct option is (D).
Question 4
4 / -1

Where is Bartholin`s gland found?

A
Liver

B
Vagina

C
Penis

D
Stomach

Solution

The Bartholin's glands are located on each side of the vagina's opening. They secrete a fluid that helps lubricate the vagina. Sometimes the ducts of these glands become obstructed and fluid backs up, forming a cyst.

Hence, the correct option is (B).
Question 5
4 / -1

Which of the following techniques is a non-invasive method for the detection of fetal disorders?

A
CVS

B
Foetoscopy

C
Ultrasound imaging

D
Amniocentesis

Solution

Ultrasound imaging (sonography) uses high-frequency sound waves to view inside the body. Because ultrasound images are captured in real-time, they can also show the movement of the body's internal organs as well as blood flowing through the blood vessels. Noninvasive prenatal testing (NIPT), sometimes called noninvasive prenatal screening (NIPS), is a method of determining the risk that the fetus will be born with certain genetic abnormalities. This testing analyzes small fragments of DNA that are circulating in a pregnant woman's blood.

Hence, the correct option is (C).
Question 6
4 / -1

Introduction of genes coated with gold microparticles into a cell by firing them at high speeds is known as

A
Mutation

B
Transfection

C
Biolistics

D
Homologous recombination

Solution

The biolistic procedure, also known as the “gene gun”, involves firing small metal particles coated with the construct DNA into plant cells. The metal particles, usually gold or tungsten, are accelerated to high speed by the rapid release of high-pressure helium in the gene gun into the target cells. Often called biolistic transformation, the technique involves accelerating micron-sized gold particles coated with DNA (bullets) toward a living target, essentially a “gene gun”.

Hence, the correct option is (C).
Question 7
4 / -1

Match the following:

RNA polymerase type Responsible for transcription of

A. RNA polymerase I 1. hnRNA

B. RNA polymerase II 2. rRNA

C. RNA polymerase III 3. snRNA

A
A - 1, B - 2, C - 3

B
A - 3, B - 1, C - 2

C
A - 2, B - 1, C - 3

D
A - 3, B - 2, C - 1

Solution

RNA polymerase type Responsible for transcription of

A. RNA polymerase I 2. rRNA

B. RNA polymerase II 3. snRNA

C. RNA polymerase III 1. hnRNA

Hence, the correct option is (C).
Question 8
4 / -1

______ are commonly known as imperfect fungi.

A
Phycomycetes

B
Ascomycetes

C
Basidiomycetes

D
Deuteromycetes

Solution

Deuteromycetes are called imperfect fungi as these are fungi that do not fit into the commonly established taxonomic classifications of fungi that are based on biological species concepts or morphological characteristics of sexual structures because their sexual form of reproduction has never been observed. Only their asexual form of reproduction is known, meaning that these fungi produce their spores asexually, in the process called sporogenesis.

Hence, the correct option is (D).
Question 9
4 / -1

Which of the following ranges of wavelength is called PAR or photosynthetically active radiation?

A
760 – 1000 nm

B
380 – 420 nm

C
760 – 900 nm

D
400 – 700 nm

Solution

Photosynthetically Active Radiation (PAR) is the light wavelength range that is the best fit for photosynthesis to occur. Photosynthesis is a process that requires light energy and optimally occurs in the 400 to 700 nanometer (nm) range 1. This range is also known as visible light.

Hence, the correct option is (D).
Question 10
4 / -1

Who introduced the term `niche`?

A
Grinnel

B
Sir Arthur Tansely

C
Ernst Haeckel

D
Edward Wilson

Solution

The term was coined by the naturalist Roswell Hill Johnson but Joseph Grinnell was probably the first to use it in a research program in 1917, in his paper "The niche relationships of the California Thrasher".

A niche refers to the way in which an organism fits into an ecological community or ecosystem. Through the process of natural selection, a niche is the evolutionary result of a species morphological (morphology refers to an organism's physical structure), physiological, and behavioral adaptations to its surroundings.

Hence, the correct option is (A).

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RNA polymerase type	Responsible for transcription of
A. RNA polymerase I	1. hnRNA
B. RNA polymerase II	2. rRNA
C. RNA polymerase III	3. snRNA

Biology Test 131

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Biology Test 131

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SHARING IS CARING

Question 1

Expelling out glucose

Expelling out salts

Expelling out excess water

Expelling out minerals

Solution

Question 2

Pin pricked → Receptor → Sensory neurone → Relay neurone → Motor neurone → Effector → Response

Pin pricked → Effectors → Sensory neuron → Motor neuron → CNS → Receptor

Pin pricked → Receptors → Relay neuron → CNS → Motor neuron → Sensory neuron → Effector

Pin pricked → Receptor → Relay neuron → Sensory neuron → CNS → Motor neuron → Effector

Solution

Question 3

Only (a)

Both (a) and (b)

Only (b)

Only (c)

Solution

Question 4

Liver

Vagina

Penis

Stomach

Solution

Question 5

CVS

Foetoscopy

Ultrasound imaging

Amniocentesis

Solution

Question 6

Mutation

Transfection

Biolistics

Homologous recombination

Solution

Question 7

A - 1, B - 2, C - 3

A - 3, B - 1, C - 2

A - 2, B - 1, C - 3

A - 3, B - 2, C - 1

Solution

Question 8

Phycomycetes

Ascomycetes

Basidiomycetes

Deuteromycetes

Solution

Question 9

760 – 1000 nm

380 – 420 nm

760 – 900 nm

400 – 700 nm

Solution

Question 10

Grinnel

Sir Arthur Tansely

Ernst Haeckel

Edward Wilson

Solution

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