Help 7) In a bacterium, we will find DNA in A) a membrane-enclosed nucleus B) mi
ID: 265821 • Letter: H
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7) In a bacterium, we will find DNA in A) a membrane-enclosed nucleus B) mitochondria C) the nucleoid D) ribosomes 8) What is the function of the nuclear pore complex found in eukaryotes? A) It regulates the movement of proteins and RNAs into and out of the nucleus. B) I t synthesizes the proteins required to copy DNA and make mRNA C) I t selectively transports molecules out of the nucleus, but prevents all inbound molecules from entering the nucleus. D) It assembles ribosomes from raw materials that are synthesized in the nucleus. 9) W in the nuclear membrane? A) DNA B) amino acids C) mRNA D) phospholipids hich of the following macromolecules leaves the nucleus of a eukaryotic cell through pores )Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules? A) lipids B) glycogern C) proteins D) nucleic acids 11) Which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells? A) hormonal signaling B) autocrine signaling C) paracrine signaling D) synaptic signaling 12) In eukaryotic cells, chromosomes are composed of A) DNA and RNA B) DNA only C) DNA and proteins D) DNA and phospholipids 13) What is the final result of mitosis in a human? A) genetically identical 2n somatic cells B) genetically different 2n somatic cells C) genetically identical In somatic cellsExplanation / Answer
Answer:
7). C). Nucleoid
Explanation:
In prokaryotes, the main DNA molecule (bacterial chromosome) is present in a region called the nucleoid, but the nucleoid lacks a surrounding membrane.
8). A). It regulates the movement of proteins and RNAs into and out of the nucleus
Explanation:
Nuclear pores are protein-based channels in the nuclear envelope. They regulate the movement of molecules from the nucleus to the cytoplasm, and vice versa.
9). C). mRNA
Explanation: mRNA is synthesized from template strand of DNA in nucleus and the mRNA is transported from nucleus to cytoplasm.
10). C). Proteins
Explanation: Protein synthesis occurs in ribosomes
11). C). Paracrine signaling
12). C). DNA and proteins
Explanation: Eukaryotic chromosome consists of DNA and histone proteins.
13). A). Genetically identical 2n somatic cells
Explanation: Mitosis is equational division. Daughter cells of mitosis are alike of parent cell by genetically and physically. Mostly mitosis occurs in somatic cells.
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