Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 60

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Question 1
1 / -0

Single large blood vessel in Cockroach is _______________.

A
Lateral artery

B
Ventral aorta

C
Posterior aorta

D
Anterior aorta

Solution

D. Anterior aorta
EXPLANATION: The anterior aorta is the first part of aorta. It begins at the aortic orifice on the base of the ventricle, roughly at the level of the lower border of the third left costal cartilage. The three branches of aorta are the brachiocephalic artery, the left common carotid artery and the left subclavian artery. Single large blood vessels in cockroach is an anterior aorta.
Question 2
1 / -0

Sugar present in blood plasma of Cockroach is _____________.

A
Sucrose

B
Glucose

C
Trehalose

D
Lactose

Solution

Answer is option C "Trehalose"
Trehalose is the sugar circulating in the blood or haemolymph of most insects. It is the major blood sugar in insects playing a crucial role as an instant source of energy and in dealing with abiotic stresses.
Question 3
1 / -0

Chromophil cells of pharyngeal mass are ________________.

A
Digestive cells

B
Glandular cells

C
Storage cells

D
None of these

Solution

The answer is option A i.e. "Digestive cells".
Chromophil cells found in the pharyngeal mass of earthworm function like digestive cells. These cells secrete saliva as a secretion which containing mucus and proteolytic enzymes. This helps in digestion.
Question 4
1 / -0

Buccal segment of Pheretima is_____________.

A
First segment

B
Second segment

C
Third segment

D
Both B and C

Solution

A. First segment
EXPLANATION: Pheretima is the common Indian earthworm. It is found in every part of world. The first segment of pheretima is called as buccal segment. The buccal segment contains mouth. A small tongue-like lobe is present just above the mouth, which is called as prostomium.
Question 5
1 / -0

Heart muscle is sensitive to:

A
Electrical stimuli

B
Chemical stimuli

C
Mechanical stimuli

D
All the above

Solution

Heart muscle or cardiac muscle is one of the three major types of muscles present in vertebrates. It is an involuntary, striated muscle. The heart muscle is sensitive to electrical, chemical (drugs) and mechanical stimuli.
So, the correct answer is option D- 'All of the above'.
Question 6
1 / -0

Mesothelium is present in.

A
Body cavity

B
Wall of gut

C
Uterus

D
Wall of blodd vessels

Solution

A. Body cavity
EXPLANATION: Mesothelium is a membrane, which is made up of simple squamous epithelium. It forms the lining of several body cavities, like pleura (thoracic cavity), peritoneum (abdominal cavity), pericardium (heart sac).
Question 7
1 / -0

The contractile regulatory proteins that mask and unmask active sites in the sarcomere are:

A
Troponin and tropomyosin

B
Troponin and myosin

C
Actin and myosin

D
Troponin 1 and troponin C
Solution
- The contractile regulatory proteins that mask and unmask active sites in the sarcomere are troponin and tropomyosin.
- The two tropomyosin filaments run close to the actin filaments throughout its length.
- The troponin units are distributed throughout the length of tropomyosin filaments and mask the active binding sites for myosin.
- During muscle contraction, the increased calcium ion levels lead to their binding to a subunit of troponin and unmasking the active sites for myosin filaments.
So, the correct answer is option A.
Question 8
1 / -0

At full muscle contraction, the Z-lines attached to thin filaments are almost touching

A
A-band

B
I-band

C
Actin fibres

D
H-zone

Solution

As shown in the diagram, as the myofibril contracts, the actin filaments are pulled by myosin filaments to the center, which is explained by the sliding filament theory.
So, when the muscle is fully contracted, the I band almost disappears and Z line comes to lie close, touching the A band.
So, the correct option is 'A-band'.
Question 9
1 / -0

Which among the following is correctly categorized?

A
Troponin and Myosin $$\rightarrow$$ Complex proteins in striated muscles

B
Calcitonin and Thymosin $$\rightarrow$$ Thyroid hormones

C
Pepsin and Prolactin $$\rightarrow$$ Digestive enzymes secreted in stomach

D
Secretin and Rhodopsin $$\rightarrow$$ Polypeptide hormones
Solution
1. The various complex proteins involved in muscle contraction are actin and myosin along with troponin and tropomyosin.
2. Thyroid hormones are triiodothyronine (T3) and Tetraiodothyronine (T4) which help in regulating the Basal Metabolic Rate of the body.
3. Pepsin is a protein digestive enzymes secreted in the stomach but prolactin is a hormone secreted by the anterior pituitary.
4. Secretin is a polypeptide hormone which functions to regulate pH of the stomach by inhibiting gastric acid secretion but rhodopsin is the visual pigment present in our eyes and a G protein-coupled-receptor.
So, the correct option is
'Troponin and Myosin → Complex proteins in striated muscles'.
Question 10
1 / -0

A bone is connected to another bone by:

A
Tendon

B
Ligament

C
Cartilage

D
Muscle

Solution

A ligament is a fibrous connective tissue that attaches bone to bone and usually serves to hold structures together and keep them stable. So, the correct answer is 'Ligament'.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 60

Result

Structural Organisation in Animals Test - 60

Score

-

Rank

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SHARING IS CARING

Question 1

Lateral artery

Ventral aorta

Posterior aorta

Anterior aorta

Solution

Question 2

Sucrose

Glucose

Trehalose

Lactose

Solution

Question 3

Digestive cells

Glandular cells

Storage cells

None of these

Solution

Question 4

First segment

Second segment

Third segment

Both B and C

Solution

Question 5

Electrical stimuli

Chemical stimuli

Mechanical stimuli

All the above

Solution

Question 6

Body cavity

Wall of gut

Uterus

Wall of blodd vessels

Solution

Question 7

Troponin and tropomyosin

Troponin and myosin

Actin and myosin

Troponin 1 and troponin C

Solution

Question 8

A-band

I-band

Actin fibres

H-zone

Solution

Question 9

Troponin and Myosin $$\rightarrow$$ Complex proteins in striated muscles

Calcitonin and Thymosin $$\rightarrow$$ Thyroid hormones

Pepsin and Prolactin $$\rightarrow$$ Digestive enzymes secreted in stomach

Secretin and Rhodopsin $$\rightarrow$$ Polypeptide hormones

Solution

Question 10

Tendon

Ligament

Cartilage

Muscle

Solution

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