Question
(b) Paragraph 1 describes the role of the sperm cell head in penetrating the egg cell during fertilisation. The sperm cell penetrates the granulosa cells of the __ The head of the sperm cell binds with the __ of the egg cell. The sperm head releases __ to digest the glycoprotein protective coat of the egg cell. Paragraph 1 Identify the missing words R, S and T in Paragraph 1. __ s T (c) A sperm cell and an epithelial cell each contain a nucleus. State one difference between the nucleus of a sperm cell and the nucleus of an epithelial cell. (1)
Answer
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Anwen
Master · Tutor for 5 years
Answer
R: Corona RadiataS: Plasma MembraneT: EnzymesThe difference between the nucleus of a sperm cell and the nucleus of an epithelial cell is that the sperm cell nucleus contains half the number of chromosomes as the epithelial cell nucleus.
Explanation
## Step 1: Identifying the missing wordsThe question is asking us to fill in the blanks in the paragraph about the role of the sperm cell head in fertilization. We need to use our knowledge of biology to identify the correct terms.## Step 2: Identifying RThe granulosa cells are part of the corona radiata, which is a layer of cells that surround the egg cell. Therefore, R should be "corona radiata".## Step 3: Identifying SThe head of the sperm cell binds with the outer layer of the egg cell, which is known as the plasma membrane. Therefore, S should be "plasma membrane".## Step 4: Identifying TThe sperm head releases enzymes to digest the glycoprotein protective coat of the egg cell. Therefore, T should be "enzymes".## Step 5: Identifying the difference between the nucleus of a sperm cell and the nucleus of an epithelial cellThe nucleus of a sperm cell contains half the number of chromosomes as the nucleus of an epithelial cell. This is because sperm cells are haploid cells, meaning they contain one set of chromosomes, while epithelial cells are diploid cells, meaning they contain two sets of chromosomes.