3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F. Example: The pulmonary artery carries blood to the lungs T F (a) If the eyepiece lens of a microscope is marked X10 and the objective lens is marked X4, the total magnification is X14 T F (b) Plant cells have chloroplasts, animal cells do not have chloroplasts T F (c) Humans receive oxygen from the air they inhale T F (d) Cell membranes let only some molecules pass through T F (e) Human chromosomes are found in the nucleus T F

Leaving Cert Biology Cell Metabolism & Enzymes: 3. Indicate whether the followin

3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

Question 3

3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F. Example: The pulmonary artery carries blood to the lungs T F (a) I... show full transcript

Worked Solution & Example Answer:3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

Step 1

If the eyepiece lens of a microscope is marked X10 and the objective lens is marked X4, the total magnification is X14

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Answer

False. The total magnification is calculated by multiplying the eyepiece magnification by the objective magnification:

$X10 \times X4 = X40.$

Therefore, this statement is incorrect.

Step 2

Plant cells have chloroplasts, animal cells do not have chloroplasts

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Answer

True. Plant cells contain chloroplasts for photosynthesis, whereas animal cells do not contain these structures, making this statement correct.

Step 3

Humans receive oxygen from the air they inhale

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Answer

True. Humans do breathe in oxygen from the air, which is essential for cellular respiration and overall metabolic function.

Step 4

Cell membranes let only some molecules pass through

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Answer

True. Cell membranes are selectively permeable, allowing certain molecules to pass while restricting others, thus maintaining homeostasis.

Step 5

Human chromosomes are found in the nucleus

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Answer

True. Chromosomes, which are structures of DNA, are located within the nucleus of human cells.

3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

Worked Solution & Example Answer:3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

If the eyepiece lens of a microscope is marked X10 and the objective lens is marked X4, the total magnification is X14

Plant cells have chloroplasts, animal cells do not have chloroplasts

Humans receive oxygen from the air they inhale

Cell membranes let only some molecules pass through

Human chromosomes are found in the nucleus

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