Anatomy

Step 1: Genetic manipulation processes.
Genetic manipulation refers to processes like recombination, replication, and transcription that change, duplicate, or utilize genetic information.
Step 2: Role of recombination, replication, and transcription.
- Recombination involves exchange of DNA segments, altering genetic material.
- Replication copies DNA, ensuring genetic material is passed on.
- Transcription converts DNA into RNA, a key step in gene expression.
Step 3: Role of supercoiling.
Supercoiling is a structural change that compacts DNA, but it does not directly alter or manipulate the sequence of DNA. It only influences packaging and accessibility.
Step 4: Conclusion.
Thus, supercoiling is not considered a form of genetic manipulation.
Final Answer:

Step 1: Structure of brachial plexus.
The brachial plexus is a network of nerves formed by the ventral rami of spinal nerves C5–T1.
It supplies the upper limb (shoulder, arm, forearm, and hand).
Step 2: Major nerves from brachial plexus.
- Radial nerve (A): Supplies posterior arm and forearm muscles.
- Median nerve (D): Supplies most forearm flexors and some hand muscles.
- Ulnar nerve (E): Supplies intrinsic hand muscles and some forearm flexors.
Step 3: Excluded nerves.
- Obturator nerve (B): Originates from lumbar plexus (L2–L4), not brachial plexus.
- Phrenic nerve (C): Originates from cervical plexus (C3–C5), not brachial plexus.
Step 4: Conclusion.
Thus, the correct nerves from brachial plexus are Radial, Median, and Ulnar.

Step 1: Structure of the eye orbit.
The orbit is a bony cavity that houses the eye and its associated structures.
It is formed by contributions from several bones: frontal, maxillary, zygomatic, sphenoid, ethmoid, lacrimal, and palatine.
Step 2: Role of the frontal bone.
The frontal bone forms the superior part of the orbital cavity (roof of the orbit).
It provides structural support and protection for the eye.
Step 3: Analysis of options.
- (A) Parietal bone: Forms the sides and roof of the skull, not the orbit.
- (B) Temporal bones: Form the sides of the skull and house the ear structures.
- (C) Occipital bone: Forms the posterior part of the skull, not related to orbit.
- (D) Frontal bone: Correct, contributes to the superior wall of the eye orbit.
Step 4: Conclusion.
The bone responsible for holding the orbit of the eye is the frontal bone.

Step 1: Statement A.
Correct — Most skeletal muscles cross at least one joint.
Step 2: Statement B.
Incorrect — Muscles only pull during contraction; they do not push.
Step 3: Statement C.
Correct — During contraction, insertion moves towards the origin.
Step 4: Statement D.
Correct — The bulk of muscle mass lies proximal to the joint crossed.
Step 5: Statement E.
Correct — Muscles have at least two attachments: origin and insertion.
Step 6: Conclusion.
The true statements are A, C, D, and E only.

Step 1: Understanding the problem.
The child has 20 deciduous teeth. Out of these, any 2 teeth can be chosen to be decayed. This is a typical problem of combinations where order does not matter.
Step 2: Formula for combinations.
The number of ways of choosing items from items is given by:
Step 3: Applying the values.
Here (teeth) and (decayed teeth).
Step 4: Analyzing options.
Although the correct calculation gives , many times questions provide variations like mirror combinations (upper/lower jaws) or permutations. In such cases, answer may differ.
But the correct fundamental solution is .
Final Answer:

Step 1: Understanding Harris–Benedict equation.
The Harris–Benedict equation is a widely used formula for estimating basal metabolic rate (BMR), which represents the number of calories required to maintain basic body functions like breathing, circulation, and cell production at rest.
Step 2: Formula for men.
For men, the original Harris–Benedict formula is:
where = weight in kilograms, = height in cm, = age in years.
Step 3: Multiplying with activity and injury factor.
To get the daily requirement, this basal value is multiplied with activity factor (to adjust for lifestyle/physical activity) and injury factor (to adjust for stress or trauma).
Step 4: Comparing with given options.
Only option (C) matches this equation exactly for males.
Final Answer:

Step 1: Recall basic definitions of body movements.
- Flexion decreases the angle of a joint, bringing two bones closer together.
- Extension increases the angle of a joint or distance between two bones.
- Abduction means moving a limb away from the midline of the body.
- Adduction means moving a limb toward the midline of the body.
Step 2: Match correctly.
- (A) Flexion → III (Decreases angle of joint, bones close together).
- (B) Extension → IV (Increases angle or distance between bones).
- (C) Abduction → I (Moving limb away from midline).
- (D) Adduction → II (Movement of limb towards midline).
Step 3: Analyze the given options.
- (A) A - II, B - III, C - IV, D - I: Incorrect matching.
- (B) A - III, B - IV, C - I, D - II: Correct matching.
- (C) A - I, B - II, C - III, D - IV: Incorrect, mismatched.
- (D) A - IV, B - III, C - II, D - I: Wrong, abduction and adduction swapped.
Step 4: Conclusion.
The correct match is Flexion → III, Extension → IV, Abduction → I, Adduction → II.